Feeds

Ten classic electronic calculators from the 1970s and 1980s

Lo-tech delights for button-pushers worldwide

The Power of One Brief: Top reasons to choose HP BladeSystem

Texas Instruments TI-35 (1979)

Reg Hardware retro numbers

If you didn’t have a Casio calculator around this time, there’s a pretty good chance that you had a Texas Instruments one instead. Mostly known now for chips, back then the firm also produced the Speak and Spell and other educational devices, as well as calculators.

Texas Instruments TI-35

Source: Bob Wolfson

The TI-35 was a “slimline” LCD model, with an eight-character display - by 1979 LEDs were, like the Callaghan government, on their way out. With a modest range of functions which nevertheless included basic stats, and a “Constant Memory” which retained values even when the device was turned off, this was a pretty competent calculator, with a very distinct feel to the keys, which felt as if they were hinged at the top.

Hewlett-Packard HP-41C (1979)

Reg Hardware retro numbers

If the all-singing, all-dancing card-reading TI-59 was the Fred Astaire of programmable calculators, then the HP-41C was Ginger Rogers, doing it backwards in Reverse Polish Notation. It wasn’t the first calculator to use the method - previous HP models had it, and so did one of the early Sinclairs, too - but it also added a world first alphanumeric display, and was HP’s first LCD model into the bargain.

Hewlett-Packard HP-41C

Source: Twylo

The display made programming much simpler, and you could even reassign the keys, with blank templates available, allowing pre-programmed calculators to be handed to users for specific tasks. Expansion slots on the top edge allowed for pre-programmed memory to be added, along with peripherals such as a printer and a magnetic card reader which could read and translate cards from the earlier HP-67.

Using blade systems to cut costs and sharpen efficiencies

Next page: Casio FX-81 (1981)

More from The Register

next story
Report: American tech firms charge Britons a thumping nationality tax
Without representation, too. Time for a Boston (Lincs) Macbook Party?
Child diagnosed as allergic to iPad
Apple's fondleslab is the tablet dermatitis sufferers won't want to take
Microsoft takes on Chromebook with low-cost Windows laptops
Redmond's chief salesman: We're taking 'hard' decisions
For Lenovo US, 8-inch Windows tablets are DEAD – long live 8-inch Windows tablets
Reports it's killing off smaller slabs are greatly exaggerated
Cheer up, Nokia fans. It can start making mobes again in 18 months
The real winner of the Nokia sale is *drumroll* ... Nokia
Seventh-gen SPARC silicon will accelerate Oracle databases
Uncle Larry's mutually-optimised stack to become clearer in August
prev story

Whitepapers

Seven Steps to Software Security
Seven practical steps you can begin to take today to secure your applications and prevent the damages a successful cyber-attack can cause.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.