Hewlett Packard HP-33E/HP-33C

HP-33E Serial number	2002S30433: 1980, 2nd week, Singapore
Accessories	Pouch
Condition	Average. Like on my HP-37E the top right edge of the display cover broke off. In the battery compartment both contact latches are missing. Next to the screws inside the battery compartment where the back is attached to the front housing the plastic broke but no parts are missing. On the lower right front corner a small piece of plastic broke off. The calculator does not at all work with batteries because of a contact problem. It does work with the external power supply but the connector sometimes has contact problems as well.
Repairs	7.11.2002 Soldered battery contacts
Acquired	28.10.2002
Accessory	Handbooks
	HP-33E Bedienungs- und Programmierhandbuch (German), April 1979
	HP-33E Programm-Beispiele (German), April 1979
	Allgemeines Handbuch für technisch-wissenschaftliche Rechner (German), January 1979
Acquired	20.12.2002
Accessory	HP-33E Bedienungs- und Programmierhandbuch (German), undated, mint
	HP-33E Kurzanleitung (German), undated, mint
Acquired	16.2.2003

HP-33E Serial number	1935S33364: 1979, 35th week, SIngapore
Accessories	DC 220V power supply
Condition	Outside cosmetically mint! Battery pack completely corroded, one of the battery contacts broke off.
Repairs, Comments
Acquired	29.12.2003

HP-33C Serial number	2114S33090: 1981, 14th week, Singapore
Accessories	None
Condition	Excellent! Only very minor scratches due to normal wear.
Repairs, Comments	-
Acquired	28.1.2003
Accessory	Power supply, 220V AC
Acquired	11.9.2003

HP codename, series	HP-33E: Sage, HP-33C: Sage-C, Spice
Typ, Precision, Input mode	Scientific, 10 BCD digits, exponent ±99, Reverse Polish Notation
Programmable	Yes, keystrokes, 49 steps, no instruction insertion or deletion, no symbolic labels. Definitely one of the slowest calculators.
Performance Index	1.3
Memory	8 memories (0-7), no permanent memory (HP-33E), permanent memory (HP-33C)
Display	10 digit 7 segment red LED plus sign
Special features	-
Original Pricing, Production	HP-33E: 1.5.1978 ($100) - 1.12.1981 ($90) HP-33C: 1.7.1979 ($120) - 1.7.1983 ($65)
Batteries	2xAA battery pack, alternatively with external HP power supply or off-the-shelf DC 4.5V power supply. WARNING: When the HP power supply is used a rechargeable battery pack must be installed! When using a regular 3V-4.5V DC power supply the battery pack can be removed.
Dimensions	Length 14.1cm, Width 7.5cm, Height 2.9cm
Links	The HP-33E/33C Programmable Scientific Calculator Owner's Handbook and Programming Guide, April 1979 (PDF)
	HP-33E Quick Reference Card, 1978 (PDF)
Comment	The HP-33C was Hewlett Packard's last Spice model. One of the big drawbacks of this calculator is the Spice's notoriousely bad battery and power supply contacts: Even the shortest power interruption will clear the memory and all programs and data is lost! This is less of an issue with non programmable models like the HP-31E, HP-37E and HP-38E. And as far as I know there's no E-version of the HP-34C.