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---
title: Texas Instruments TI-55-II
categories:
- Computers
types:
- Pocket
origins:
- U.S.A.
years:
- '1981'
params:
name: TI-55-II
image: /media/museum/photos/texas_ti55ii_system_1.jpg
company: /companies/texas-instruments
company_name: Texas Instruments
specs:
- label: NAME
value: TI-55-II
- label: MANUFACTURER
value: Texas Instruments
- label: TYPE
value: Pocket
- label: ORIGIN
value: U.S.A.
- label: YEAR
value: September 1981
- label: KEYBOARD
value: 45 keys
- label: RAM
value: 56 steps - 7 memories
- label: TEXT MODES
value: 10 digits LCD display
- label: POWER SUPPLY
value: Lithium batteries
- label: PRICE
value: $50
tabs:
- adverts
forum_thread: 586
adverts:
- title: U.S. ADVERT(1982)
subtitle: ''
text: The calculator was sold with a very helpful manual (Calculator Decision-Making Sourcebook) giving step- by-step examples for the best techniques used for solving mathematical, statistical and scientific problems, as well as programming tips.
image: /media/museum/pubs/texas_ti55ii_pub_1.jpg
oc_id: 597
source:
url: https://web.archive.org/web/20230604171839/http://www.old-computers.com/museum/computer.asp?c=597
date: '2023-06-04'
---
The TI-55 was one of the first programmable calculator which keeps programs and data in memory, even when it was turned off.
112 pre-programmed functions, including statisticals.