For technical questions, call the Programming Assistance Group of Customer Support: phone: Customers outside the U.S., Canada, Puerto Rico, and the Virgin Islands Contact TI by e-mail or visit the TI e-mail: Internet: Product Service Customers in the U.S. and Canada Only Always contact Texas Instruments Customer Support before returning a product for service.
TI strongly recommends that you insure the product for value prior to mailing. Software. Software is licensed, not sold. TI and its licensors do not warrant that the software will be free from errors or meet your specific requirements.
Need help?
Do you have a question about the TI-81 and is the answer not in the manual?
Questions and answers