Eric Armin Inc. - An online dealer of TI graphing calculators, workbooks, and Vernier probes. Calculators, Inc. - Carries TI graphing calculators, CBL and CBR units, Vernier software, and educational calculator books. CalculatorsUSA - Specializes in TI, Sharp, and Casio calculators, accessories, parts and calculator workbooks. Copco - Carries fraction calculators, scientific calculators, and graphing calculators for all major brands including TI. TI Online Store - The official store for TI calculators and related merchandise. RentCalculators.org - RentCalculators.org rents Texas Instruments graphing calculators to students nationwide. Models available include the famous TI-83+, the TI-84+, the TI-86, and the TI-89 Titanium. Calculators ship same day. Rates start at $9.00.