DATAMATH

DATAMATH CALCULATOR MUSEUM

Texas Instruments LP3000 / Deskmath

Date of introduction:	June 1972	Display technology:	Panaplex II
New price:		Display size:	8
Size:	8.4" x 6.2" x 2.5"
Weight:	1 pound 14 ounces	Serial No:	3000-00632
Batteries:		Date of manufacture:	mth 08 year 1972
AC-Adapter:	120 V	Origin of manufacture:	USA
Precision:	8	Integrated circuits:	TMS0109
Memories:
Program steps:		Courtesy of:	Joerg Woerner
		Download manual:	(US: 2.4 MBytes)

The famous TI-2500 Datamath calculator was first announced in April 1972 together with the Deskmath LP3500 desktop model. Find a reprint of the Press Release about the introduction here. Beginning June 1972 first customers got in the Neiman-Marcus and Sanger-Harris department stores in Dallas, TX both the TI-2500 and this rare Deskmath LP3000 before the formally introduction on September 21, 1972.

In September 1972 the nameplates of the desktop models changed to the more common TI-3000 and TI-3500 designations. Unfortunately the "Deskmath" nickname disappeared.

To our current knowledge only few (about 1000) Deskmath calculators were produced between May 1972 and August 1972 in a beige housing. For the later production a slightly darker color was chosen. Don't miss the transitional TI-3000 Deskmath manufactured in September 1972.

Dismantling the early Deskmath LP3000 and comparing it with the later TI-3000 reveals a lot of differences:

The housing of the Deskmath LP3000 is fixed with only 3 screws instead the 5 screws found on the later TI-3000.
The top part of the housing makes use of expensive metal inserts for the screws but lacks the rounded cut outs for the keys.
The Deskmath LP3000 sports an early Panaplex II display with only 8 digits for the numbers and 3 additional signs for negative numbers, entry- and calculation-overflow.

If you have additions to the above article please email: joerg@datamath.org.