The SR-50 was Texas Instruments' first scientific pocket calculator with trigonometric and logarithm functions.

The SR-50 measured 5-3/4 inches long by 3-1/8 inches wide by 1-3/16 inches high (147 mm by 78 mm by 31 mm) and was powered by a rechargeable NiCad battery pack, built from three soldered AA cells. It had 40 keys, and flat sliding switches for degrees/radians and on/off. "SR" stood for "slide rule."

Manufactured in  1973
New price: $169.95, DM 520.00
Display size: 10 + 2
Size: 5.8" x 3.2" x 1.3"  147 x 81 x 32 mm3  
Weight: 8.5 ounces, 240 grams

Serial number SR50 0553347

Kindly donated by Francis Hookham

Manufacturer: Texas Instruments
Date: 1973

This exhibit has a reference ID of CH31351. Please quote this reference ID in any communication with the Centre for Computing History.

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