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Very powerful calculator by Sanyo, but not for its computational power...this one's a world time clock! We've got dual time, stopwatch, alarm, six function calculator with memory..so much in such a small package. Perhaps that's why they engineered the on/off switch on the back.

Polaroid attempted this product promotion for its 600 series film back in 1986 or so. There was a matching transistor radio too, and each was bundled in with the film as a freebie. This little wallet calculator is solar-powered and has membrane keys. These things will last forever in the right environment--no significant moving parts, no battery cells to corrode. And the price is right!

The credit-card size CB-700 by Casio is part of the personal finance line. The unit easily fits into a wallet or checkbook and has functions that aid in checkbook calculations. There's even a little locking mechanism that prevents unwanted views on personal information.

How the mighty have fallen. This is what gaming giant Atari was marketing in 1986: chintzy, credit card size calculators. They were down, but not totally beaten for 1989 they re-released their 2600 game system and enjoyed modest success.

This little card calculator has a most unusal capability: it's a New York City direction finder! Plug in an address, and this baby will give you the nearby cross streets, essential for navigation in Manhattan.

This is the Sharp EL-1195, aka the ThinMan. At only 14mm thick, its built-in printer was indeed incredible for its day. Sharp's early LCD calculators, including the ThinMan were part of the ELSI MATE line.

Sanyo was a leader in innovative products way back when, and this calculator/pedometer dubbed the Marathon is proof of that. This slim calculator is built with a sensor to "count" your strides as you walk. Carry this in your pocket, and with a few simple calculations, you'll know how far you've travelled!

This little pocket device has a seemingly endless list of functions: 115 name & telephone number directory; search functions; clock and calendar; credit card number storage; security lock...oh, and it's a phone dialer. Store a phone number, hold it up to a telephone receiver, push a button and this little gadget will "dial" the number for you by sending the DTMF tones.