Hewlett-Packard HP-80

Serial number	1247S12062: 1972, 47th week, Singapore
Accessories	Pouch
	Power supply
	Manual: HP-80 Bedienungs-Handbuch (German), bound printout from the MoHPC CD-ROM
Condition	Absolutely excellent! Not even the silver lining shows any kind of wear. Instructions on the back in German.
Repairs, Comment
Acquired	17.3.2003

Serial number	1507S06128: 1975, 7th week, Singapore
Accessories	Pouch
	Manual: HP-80 Bedienungs-Handbuch (German, 94 pages, dated Dec 1973)
	Quick Reference: HP-80 Kurzanleitung (German, 21 pages, dated April 1974)
	Power supply, 220V AC
	Plastic box
Condition	Absolutely excellent! Only a few small scratches in the keyboard area. Silver lining ok. On the top edge a somewhat loose sticker labelled "Property of". On the back a sticker of the "Gesamthochschule-Siegen" with "Inv.-Nr.: 120.0116/4" and other unreadable information. The sticker is in a bad shape. Instructions on the back in German.
Repairs, Comment
Acquired	9.7.2004

HP codename, series	None, Classic
Type, Precision, Input mode	Financial, 10 BCD digits, exponent ±99, Reverse Polish Notation
Programmable	No
Memory	1 storage register, not permanent
Display	15 digit 7 segment red LED, 1 digit used for sign, three for exponent and sign
Special features	Different from other HP calculators the Enter key is labelled "SAVE". On the back a sticker with instructions.
Original Pricing, Production	1.2.1973 ($395) - 1.10.1978 ($295)
Batteries	Accu pack with 3x AA cells or external power supply with special connector
Dimensions	Length 15.1cm, Width 8cm, Height 3.6cm
Links	HP-80 Owner's Manual (English), PDF, dated 4/1973 HP-80 Bedienungs-Handbuch (German), PDF, dated 8/1974 HP-80 Kurzanleitung (German), PDF, dated 4/1974 For a brief explanation of the financial functions see HP's second financial calculatr, the HP-70.
Comment	HP's second calculator and the first business/financial model.