Product number (P/N): ESR,
Keywords/Tags: ESR
Date of intro: ~1976,
Number of keys: 26, #Key-Black: 13, #Key-Orange: 1, #Key-White: 12,
Miscellaneous switch: [DEG-RAD],
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Resemblance with: C.ITOH: SR80N,
Collector value: 7/10,