Sometimes, big breakthroughs in technology can take place outside the office. Ted Papajohn designed the original Compaq Portable PC on a placemat from the House of Pies in Houston in 1982. This illust ...

The increasing versatility of calculator programming brought personal computing to a new level in many professions. The 15C had capabilities that were of particular use to marine biologists.

The Compaq Portable was a milestone for both portable computing and personal computing; it was one of the first and most successful PCs to clone the IBM PC platform and was easily transportable, thoug ...

The HP 01 took Hewlett-Packard’s portable calculator line to a new level. It could perform all the functions of a digital timekeeper and a handheld calculator. More distinctively, it could combine the ...

The HP 12C financial calculator was the longest and best-selling Hewlett-Packard product of all time. First introduced in 1981, it remained in production throughout the history of Hewlett-Packard Comp ...

The 28C was Hewlett-Packard’s first graphing calculator and the first handheld calculator from any company to be able to solve algebraic equations.

The HP 41C was one of many Hewlett-Packard calculators to blur the line between calculator and computer. It was the first Hewlett-Packard handheld device to feature an alphanumeric keyboard and expans ...

The HP 45 was the first scientific calculator to feature a “shift” key that expanded the calculator’s functions. The device also featured one of the earliest known “Easter eggs”: a stopwatch feature t ...

The HP 80 was designed for business people rather than scientists and engineers. Instead of users programming in formulas themselves, the HP 80 had 40 different time-and-money formulas preset, so all ...

The HP 97 was the most powerful personal calculator Hewlett-Packard had produced to that point. It was functionally equivalent to a handheld calculator released at the same time, the HP 67, but the 97 ...