https://www.officedepot.com/a/products/227732/Canon-TX-220TSII-Portable-Calculator/
Canon TX 220TSII Portable Calculator - Office Depot
Improve your efficiency with this Canon TX 220TSII portable display calculator. Durable plastic keytops and an ergonomic design allow for precise and...
canon txportablecalculatorofficedepot
https://en.wikipedia.org/wiki/Canon_TX
Canon TX - Wikipedia
canon txwikipedia