Texas Instruments TI-84 Plus Graphing Calculator, 10-Digit LCD - Walmart.com
Texas Instruments TI-84 Plus Graphing Calculator, 10-Digit LCD - Walmart.com
Portrait of Nicolaus Petri Title page for: N. Petri. Practicqve, to learn to count, cypheer and keep a record, 1605, Portrait of Nicolaus Petri [van Deventer], calculator and astronomer in Amsterdam. Half-length