All individuals and organizations intending to conduct weather modification activities are required to obtain a weather modification license and permit from TDLR. Development Associates of Texas, Inc. Once you’ve found a provider that you like, it’s a good idea to verify the provider’s license status using our license search tool. More information regarding the Electrician Exam can be found on the TDLR Test Details Page. See your mutual connections. Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599 Fax: (512) 463-9468 Relay Texas-TDD: (800) 735-2989 MILITARY SERVICE MEMBERS, VETERANS, AND SPOUSES. Address and Contact. Contact Adam Foster at (512) 202-8167 or adam. As our future client, you will find peace knowing that G & G Impounding is a legitimate company, that proudly complies with the Texas Department of Licensing and Regulation, the City of Austin Police Department and the surrounding county Sheriff's Offices. Residential Wireman licenses are valid for one year from the date of issuance and. State (C3252) - Easy Drivers Ed. The Texas Department of Licensing and Regulation (TDLR), the state's umbrella occupational regulator. Della Lindquist. Checking Your Application Status. TDLR's Procedural Rules - 16 TAC, Chapter 60. This is the Frequently Asked Questions page for the Property Tax Professionals program administered by the Texas Department of Licensing and Regulation. Congress Ave. Apply for a New Massage Therapist License. We protect the health and safety of Texans and ensure they are served by qualified professionals. Residential Service Companies are licensed to provide consumers with contracts also known as Home Warranties. 50 (b) (1) (A), require applicants for a speech-language pathology assistant license to have earned at least 24 semester hours in speech-language pathology and/or audiology with a grade of “C” or better. Austin Driving School is authorized to offer the official DPS Authorized Road Test at many of our 18 locations. Additional information relevant to each sample is listed on the second page of each. The Texas Department of Licensing and Regulation ( TDLR) is a state agency of Texas. License Types Regulated by TDLR. Manager at TDLR Austin, TX. gov; Region 94 - Houston. Texas Department of Public Safety, Austin. The meeting site offers free on-site parking and live video webcasts for people unable to attend. TDLR uses the same process for this pre-application evaluation as the process described below. 30 and complete June 28, 2024, according to TDLR. Covering 2,500 acres along the Colorado River with over 10 million square feet of factory floor, Gigafactory Texas is a U. Contact TDLR; Your session is about to expire!. For more information about Electricians, contact customer service. The program is now called Court-Ordered Programs. Austin-based O’Connell Robertson is attached as designer. View Larger Map. To renew a dietitian license, you must complete a minimum of 12 hours of continuing education during each 2 year licensing period, including completion of the jurisprudence examination. The Texas Commission of Licensing and Regulation adopted amendments to an existing rule at 16 Texas Administrative Code (TAC), Chapter 75, §75. Enforcement Plan. Connect Avery Gibson Graphic Designer. Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599. 710, regarding the Vehicle Storage Facilities Program, which appeared in the April 9, 2021, issue of the Texas. Home > Driver Education & Driving Safety. Chief Of Staff. The license class and endorsements that you choose will determine. This is the Frequently Asked Questions page for the Property Tax Professionals program administered by the Texas Department of Licensing and Regulation. Texas Admin Code Ch. If a certifying entity requires continuing education to maintain certification, and certification is required for Texas licensure, then that continuing education must be completed. Three hours of your choice in any of the following topics: Any topic listed in Section 83. Information Services. Electrician licenses are valid for one year from the date of issuance and must be renewed annually. $380 for a vehicle weighing more than 10,000 but less than 25,000 lbs. Licensing services for health professionals, code enforcement officers, and substance abuse professionals. [2] [3] Occupations Licensed by TDLR [4]. gov | media. Driver License Services – Appointments. TDLR announces a vacancy on the Board of Boiler Rules established by Texas Health and Safety Code, Chapter 755. Cat and dog breeders must be licensed in Texas if they possesses 11 or more adult intact female animals and are engaged in. Austin, TX 78711 (800) 803-9202 [in state. Once you have passed both the written and practical exams, you may apply for your Class A Barber license by mail using a printable PDF application form. Keep a copy of your completed application, all attachments, and your check or money order. Submit a completed Master Electrician License Application Form (PDF) with the non-refundable $45 application fee to: Texas Department of Licensing and Regulation. Submit a completed Electrical Contractor or Electrical Sign Contractor License Application (PDF) with the non-refundable $110 application fee to: Texas Department of Licensing and Regulation. #D Austin, Texas 78721. For more information about obtaining a TDLR license or renewing a TDLR license that expired while serving on active duty,. Beginning September 1, 2020, certain health care practitioners who provide direct patient care must complete an approved human trafficking prevention training course in order to renew their license. You can request assistance or submit required attachments via TDLR webform or Fax: (512) 475-2871. Loop 288 Suite 105 Denton, Texas 76205 Owner Phone: (940) 382-5003 Contact Name: John Hodge. AUSTIN (KXAN) – The head of the Texas state agency in charge of 38 license programs left his job, the agency said Monday. Fax: (512) 463-9468. Athletic Trainers. Email: dulci_g@hotmail. TDLR Customer Service | (512) 463-6599 | Toll-Free (in Texas) | (800) 803-9202 | Relay Texas-TDD: (800) 735-2989. (800) 803-9202 [in state only] A collection of Texas statutes, administrative rules, and proposed rules relating to the regulation of Air Conditioning and Refrigeration Contractors in Texas. Francis, whose retirement becomes effective Jan. Oct 31, 2023 · Updated: Oct 31, 2023 / 10:06 AM CDT. Scoops about Texas Department of Licensing. Application and Fee. The course be approved by TDLR. Box 12157 Austin, TX 78711-2157 Documents submitted with your application will not be returned. The agenda and staff reports are available online. The agenda is available online. If you are already licensed and need to resubmit your fingerprints, you can obtain your TDLR Entity/ID Number: in the body of the email you received after you renewed through the Online Licensing Services system;. TDLR is responsible for licensing and regulating a broad range of occupations, businesses, facilities, and equipment in Texas. All individuals and organizations intending to conduct weather modification activities are required to obtain a weather modification license and permit from TDLR. TDLR Withdraws Proposed Rule Changes. Texas Department of Licensing and Regulation Dietitians PO Box 12057 Austin, TX 78711. TDLR's Procedural Rules - 16 TAC, Chapter 60. Renewals may be completed online. Therefore, TDLR is ending the suspension of the expedited plan review fee effective June 1, 2021. proval, TDLR must approve you drug testing policy before you can get an active license. How to apply for an HVAC license in Texas. It will be the closest thing H-E-B will have to a downtown store. If you are eligible for examination, then you can visit the PSI website at or contact PSI by phone at (833) 333-4741 to schedule your exam date. Applying for a Texas cosmetology salon license is easy. The Texas Commission of Licensing and Regulation adopted amendments to the Elimination of Architectural Barriers program rules (16 Texas Administrative Code, Chapter 68, §68. This meeting will take place at 1106 Clayton Lane, Suite 125E, Austin, Texas and will be broadcast on TDLR’s YouTube channel. Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599 Fax: (512) 463-9468 Relay Texas-TDD: (800) 735-2989. Includes renewals, applications, address changes, and more. The Texas Department of Licensing and Regulation (TDLR) will resume a limited number of on-the-ground safety inspections and enforcement investigations beginning Wednesday, June 10, 2020. Both the TDLR and the TSBPE will investigate complaints of unlicensed contracting, bringing fines and legal charges against those who violate the licensing statutes. gov or contact us at: Texas Department of Licensing and Regulation Water Well Drillers and Pump Installers PO Box 12157 Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599 Fax: (512) 463-9468 Relay Texas-TDD: (800. How do I file a complaint with TDLR against an electrician or residential appliance installer/contractor? To file a complaint with TDLR, you can access the online complaint process. Property Tax Consultants. Inside TDLR. TDLR Approved Driver Education Course Providers. The Texas Department of Licensing and Regulation ( TDLR) is a state agency of Texas. Facebook: General TDLR Facebook page; Twitter: General TDLR Twitter account; Combative Sports Twitter account. For information regarding the Elimination of Architectural Barriers Program, email TDLR at techinfo@tdlr. Texas Dept. TDLR employees will:. Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599 Fax: (512) 463-9468 Relay Texas-TDD: (800) 735-2989. TDLR will not accept complaints filed after two years unless you can show good cause for late filing to TDLR’s Executive Director. *All meetings are by appointment only. TDLR uses the same process for this pre-application evaluation as the process described below. gov or contact us at: Texas Department of Licensing and Regulation Water Well Drillers and Pump Installers PO Box 12157 Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599 Fax: (512) 463-9468 Relay Texas-TDD: (800. House Bill 2847 passed by the 86 th Texas Legislature, amended Occupations Code, Chapter 2309, relating to the licensing and regulation of certain occupations, activities, and agreements; providing a civil penalty; authorizing. Manager at TDLR Austin, Texas, United States. Eyelash Extension Specialist licenses are valid for two years from the date of issue. TDLR uses the same process for this pre-application evaluation as the process described below. This 565-contact hour course combines classroom lecture with a literal "hands-on" laboratory setting, including 50 hours of clinical work. Application and Fee. For more information about the TDLR Auctioneers program, contact TDLR by email, or call 800-803-9202. For more information about Electricians, contact customer service. For more information about obtaining a TDLR license or renewing a TDLR license that expired while serving on active duty, please go to the Military Outreach page. Continuing Education Requirements. Boiler Forms Laws & Administrative Rules. For more information about TDLR's Water Well Drillers and Pump Installers program, e-mail TDLR at water. TDLR IHB 150 01/15 -- Instructions for completing Page 1 of 2. Online Services. Patriot Driving. gov; or emailing cs. If you are already licensed and need to resubmit your fingerprints, you can obtain your TDLR Entity/ID Number: in the body of the email you received after you renewed through the Online Licensing Services system;. Air Conditioning and Refrigeration Contractors;. Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599. The adopted rules update a reference from the “Commission” to the “Department. (512) 463-3572. For more information about obtaining a TDLR license or renewing a TDLR license that expired while serving on active duty,. gov for assistance with the licensing and permitting of weather modification operations. Get your license in familiar surroundings, and in complete comfort. See the complete list at www. License Types Regulated by TDLR. TDLR uses the same process for this pre-application. Debbie Montgomery Knoxville, TN. Penalties for Individuals/Salons. Members will serve staggered six-year terms. The meeting was archived and is available on TDLR's YouTube channel. All applicants for initial licensure must submit proof of completing the jurisprudence examination at the. Austin, TX 78711 (800. In-Person Applications. Austin, Texas 78711. If you are already licensed and need to resubmit your fingerprints, you can obtain your TDLR Entity/ID Number: in the body of the email you received after you renewed through the Online Licensing Services system;. Austin Ribbon and Computing Jul 2006 - Apr 2008 1 year 10 months. Information Services. Scoops about Texas Department of Licensing. gov; Region 93 - Austin Region. Apply Online. Contact by email. TX (C3221) - All-Tex Driving Academy LLC. You must be at least 18 years old to apply. TDLR licenses educational program providers who offer courses in drug offense education, DWI education, DWI intervention, and alcohol education for minors. Collision Free Driver Ed 9350 Struie Lane (off premise test site, east of Mo Pac Expressway and Slaughter Lane) Austin, TX 78749 1-800-562-6405. “I am humbled to be appointed as Executive Director at such a prestigious and visionary state agency. Texas Department of Licensing and Regulation P. We represent licensed professionals such as accountants, engineers, nurses, TDLR licensees, DPS licensees, mortgage loan originators, and others in disciplinary and compliance. Property Tax Professionals. Apply Online. and enter federal buildings. More information regarding the Electrician Exam can be found on the TDLR Test Details Page. Main Office Street Address: 920 Colorado, Austin, Texas 78701 Telephone: (512) 463-6599, 1- (800) 803-9202 Main Office Mailing Address: P. 31, 2022. Withdrawn Proposed Ammendments. You may mail plan reviews to TDLR by regular mail or overnight mail. (512) 463-9468. AUSTIN, Texas — Tesla appears to be planning to add to its Austin manufacturing facility,. The Texas Department of Licensing and Regulation ( TDLR) is a state agency of Texas. Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599 Fax: (512) 463-9468 Relay Texas-TDD: (800) 735-2989. Austin Driving School is authorized to offer the official DPS Authorized Road Test at many of our 18 locations. Thompson SOB, 920 Colorado St. Austin TX, 78711-2157. For more information about obtaining a TDLR license or renewing a TDLR license that expired while serving on active duty, please go to the Military Outreach page. Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599. The adopted rules update a reference from the “Commission” to the “Department. License Types Regulated by TDLR. If you have a valid driver license, you will still be able to use it to drive and access some state services, but it will no longer be accepted as official identification by the federal government. The registered business location is at 7530 Bandera Road, Ste 270, San. Austin, TX 78711 (800) 803-9202 [in. (If an email address was not provided to TDLR at the time of application, you will receive a postcard via U. $459 per unit for unit for vehicles weighing more than 25,000 lbs with a $978 total maximum. Austin, TX 78711 (800) 803-9202 [in. After submitting your application, it will take another 7 to 10 days to receive your exam information and schedule the test through PSI Exams. The Department encourages all eligible customers to conduct their driver license services online. and enter federal buildings. Massage therapy may include the use of. These are the maximum rates statewide. *All meetings are by appointment only. Texas Department of Licensing and Regulation Elimination of Architectural Barriers PO Box 12157 Austin, TX 78711 (800) 803-9202 [in state only] (512) 539-5669 (512) 539-5690 [FAX]. For the spring 2020 semester only. Dec 12 2023. TDLR will not accept complaints filed after two years unless you can show good cause for late filing to TDLR’s Executive Director. There is a non-refundable application fee of $50. AUSTIN – Mike Arismendez, a current deputy executive director of the Texas Department of Licensing and Regulation (TDLR), has been named executive director effective Feb. Has TDLR adopted standards that specifically address electrical safety in the workplace?. See the complete list at www. For information regarding the Elimination of Architectural Barriers Program, email TDLR at techinfo@tdlr. Mc Allen Texas 78503. You can click on the name of the license, endorsement, or registration you are interested in to get more detailed information. Orthotists and Prosthetists. The adopted rule makes the necessary rule changes for the Motorcycle and ATV Operator Safety program. Christopher Funderburg --. The purpose of the Board of Boiler Rules is to advise the Texas Commission of Licensing and Regulation (Commission) in the adoption of. Also, you can sign up to receive TDLR Email Updates to be notified about any further changes or updates to the Auctioneer Program. You must be at least 17 years of age to apply for a Class A Barber license. TDLR's Administrative Rules - 16 TAC, Chapter 55. For more information about TDLR's Water Well Drillers and Pump Installers program, e-mail TDLR at water. AUSTIN (KXAN) – The head of the Texas state agency in charge of 38 license programs left his job, the agency said Monday. By News Staff on Wednesday, January 12, 2022. Fingerprints provided for YOUR TDLR application shall be used to check criminal history records of the Texas Department of Public Safety and the Federal Bureau of Investigation, in accordance with applicable statutes. Box 12157 Austin, Texas 78711 (800) 803-9202 TDD: (800) 735-2989. For additional information and questions, please visit the TDLR website. Fingerprints provided for YOUR TDLR application shall be used to check criminal history records of the Texas Department of Public Safety and the Federal Bureau of Investigation, in accordance with applicable statutes. To obtain a license, you must meet all eligibility requirements, take and pass an examination, and pay. If you have a valid driver license, you will still be able to use it to drive and access some state services, but it will no longer be. Austin – Far South: 3100 A West Slaughter Lane, Austin South: 5700 Manchaca Road, Suite 375, North Austin: 2927-B W. TDLR is responsible for licensing and regulating a broad range of occupations, businesses, facilities, and equipment in Texas. The Texas Department of Licensing and Regulation establishes standards for licensure of behavior analysts with the assistance of the Behavior. Beginning September 1, 2020, certain health care practitioners who provide direct patient care must complete an approved human trafficking prevention training course in order to renew their license. The agenda and staff reports (PDF) are available online. Jurisprudence Exam. Next, you will be asked to enter your “Agency Assigned Applicant Number. Austin, TX 78711 (800) 803-9202 [in state only] (512) 463-6599. TDLR issues certificates of registration to laser hair removal facilities, qualified individuals who perform laser hair removal procedures, and agency-accepted training programs within the state of Texas. The Texas Department of Licensing and Regulation (TDLR) is the state's umbrella. TX (C3498) - Tyler Driving School. The purpose of the Board of Boiler Rules is to advise the Texas Commission of Licensing and Regulation (Commission) in the adoption of. Rule Adoption. gov; Region 93 - South Texas Region (Corpus Christi) Terry Hewitt. CONTACT US. AUSTIN (KXAN) — A woman who reported a massage therapist sexually assaulted her in October 2022 has filed a lawsuit against the spa where the man worked. Contact by email. The Behavior Analyst Advisory Board met December 11, 2023 via videoconference. The Texas Commission of Licensing and Regulation adopted amendments to the Elimination of Architectural Barriers program rules (16 Texas Administrative Code, Chapter 68, §68. Class A Barber licenses are valid for two years from the date of issue. Customer Service Representatives are available Monday through Friday (excluding holidays) at (800) 803-9202 [in state only], (512)463-6599, Relay Texas-TDD: (800) 735-2989. Air Conditioning and Refrigeration Contractors. old naked grannys, apartamentos en alquiler con agua y luz incluidobayamn
TDLR's Procedural Rules - 16 TAC, Chapter 60. . Tdlr austin
Wilmington, DE 19801. When you become eligible to sit for an examination, TDLR will notify PSI electronically. 735 followers 500+ connections See your mutual connections. 70,097 likes · 183 talking about this · 1,335 were here. TDLR Withdraws Proposed Rule Changes. If you have a valid driver license, you will still be able to use it to drive and access some state services, but it will no longer be accepted as official identification by the federal government. On November 23, 2020, the Texas Commission of Licensing and Regulation passed an emergency rule related to the COVID-19 pandemic. Home > Driver Education & Driving Safety. Austin, TX 78711 (800) 803-9202 [in state. There are four types of plumbing licenses: Tradesman Plumber-Limited , Journeyman , Master, and Plumbing Inspector. Jul 7, 2023 · TDLR continuing education requirements are waived for all individual licenses expiring in March, April, and May 2020. License Types Regulated by TDLR. Box 12157 Austin, Texas 78711 Telephone: (512) 463-6599 Toll-Free (in Texas): (800) 803-9202 Relay Texas-TDD: (800) 735-2989 Our hours of operation by phone are 8 am to 5 pm Monday through Friday excluding holidays. Fax: (512) 463-9468. Driver License Services – Appointments. The Texas Commission of Licensing and Regulation adopted amendments to the Elimination of Architectural Barriers program rules (16 Texas Administrative Code, Chapter 68, §68. TDLR Withdraws Proposed Rule Changes. Upon TDLR approval of eligibility, PSI will send you an email confirmation with instructions for scheduling an appointment to take the examination. The license class and endorsements that you choose will determine. TDLR uses the same process for this pre-application evaluation as the process described below. TDLR's Enabling Statute - Occupations Code, Chapter 51. This message is provided to notify you of changes to the Used Automotive Parts Recyclers law (s). The Moody Center in Austin is building a bunker suite and speakeasy set for April 1, 2024, according to a TDLR listing. TDLR is responsible for licensing and regulating a broad range of occupations, businesses, facilities, and equipment in Texas. TDLR's Procedural Rules - 16 TAC, Chapter 60. If a complaint results in disciplinary action taken by TDLR, it will be posted in our Administrative Orders Search for three years following the signed order. TDLR is responsible for licensing and regulating a broad range of occupations, businesses, facilities, and equipment in Texas. TDLR regulates orthotists and prosthetists, orthotic and prosthetic assistants, students, technicians, and facilities that conduct. See the members of the new Motor Fuel Metering and Quality Workgroup. AUSTIN – The Texas Department of Licensing and Regulation released its 2023 -2027 Strategic Plan and. However, it is your responsibility to renew your registration before it expires. Toll-free: (800) 803-9202. If a certifying entity requires continuing education to maintain certification, and certification is required for Texas licensure, then that continuing education must be completed. TDLR IHB 150 01/15 -- Instructions for completing Page 1 of 2. Written notification of name changes must be mailed or faxed to TDLR and must include a copy of a marriage certificate, court decree evidencing such change, or a social security card reflecting the new name. 70,097 likes · 183 talking about this · 1,335 were here. The fee to request a copy of your license is $25. Electrician licenses are valid for one year from the date of issuance and must be renewed annually. Patriot Driving. July 27, 2020. Licensees may start employing the new fees listed above on November 1, 2021. TDLR's Core Values and Mission Statement. TDLR is now accepting applications for Transportation Network Company (TNC) permits. Contact TDLR. For more information about obtaining a TDLR license or renewing a TDLR license that expired while serving on active duty, please go to the Military Outreach page. Austin, TX 78711 (800) 803-9202 [in state. TDLR uses the same process for this pre-application evaluation as the process described below. Get your license in familiar surroundings, and in complete comfort. [TDLR’s Greg Alvarez and Legacy FC team up for Holiday Supply Drive focused on Austin-area Youth Center] TDLR's Greg Alvarez and Legacy FC team up fo. By News Staff on Wednesday, January 12, 2022. There are four types of plumbing licenses: Tradesman Plumber-Limited , Journeyman , Master, and Plumbing Inspector. More information regarding the Electrician Exam can be found on the TDLR Test Details Page. If I have another type of electrical license issued by TDLR, do I have to obtain a Residential Appliance Installer license to perform the appliance installation? No, but you must work for a licensed electrical contractor and hold the appropriate electrical license in order to perform the installation. After submitting your application, it will take another 7 to 10 days to receive your exam information and schedule the test through PSI Exams. 5 followers 5 connections. htm#customerservice Members Staff Division Directors Field Offices Fort Worth. Austin Drug Test: Attn Joseph H Lones III, DC, 10102 North Lamar Blvd, Austin, TX 78753 (512) 835-1955: Austin Mobile Drug Testing: SUITE H, 402 WEST PALM VALLEY BLVD, ROUND ROCK, TX 78664 (512) 507-5983: Brown Chiropractic and DOT Physicals: 746 Elm St. Search TDLR's Web Site. 3) Present one of the following: a) most recent TDLR-approved form:. Beginning May 7, 2025, all Texans will need a REAL ID with a gold star to fly within the U. AboutTexas Department of Licensing and Regulation (TDLR) Texas Department of Licensing and Regulation (TDLR) is located at 920 Colorado St in Austin, Texas 78701. See the complete list at www. License Types Regulated by TDLR. PO Box 12157. For more information about obtaining a TDLR license or renewing a TDLR license. gov; Region 93 - South Texas Region (Corpus Christi) Terry Hewitt (361) 800-5643 Terry. This email will include instructions on how to schedule your exams, along with your personal candidate number. There is a non-refundable application fee of $50. [2] [3]. The workgroup will provide input, advice and recommendations on the regulatory framework that TDLR will develop surrounding electric vehicle charging stations. Mailing Address: Texas Department of Licensing and Regulation. Kenny Wright. Board Members. Jul 23, 2021 · TDLR has discontinued COVID-19 protocols for Combative Sports events in Texas until further notice, as of July 1, 2021. The Board provides consumer information about the requirements for certification in each of the specialty practice areas. 5 followers 5 connections. Individuals may request TDLR review their criminal background before actually applying for a license. All applicants for initial licensure must submit proof of completing the jurisprudence examination at the. gov; Region 93 - South Texas Region (San Antonio) Lee Garde (726) 223-1474 Lee. Submit a completed Journeyman Electrician License Application Form (PDF) with the non-refundable $30 application fee to: Texas Department of Licensing and Regulation. PO Box 12157. gov; Region 93 - Austin Region. Fax: (512) 463-9468. The adopted rules update a reference from the “Commission” to the “Department. AUSTIN (KXAN) — A woman who reported a massage therapist sexually assaulted her in October 2022 has filed a lawsuit against the spa where the man worked. For more information about TDLR's Water Well Drillers and Pump Installers program, e-mail TDLR at water. (d/b/a Select Home Warranty) License Number 161. TDLR Report this profile Experience State TDLR View Debbie’s full profile See who you know in common Get introduced. TDLR's Administrative Rules - 16 TAC, Chapter 55. . sexmex bideos