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2300 BCE
the abacus
The abacus, also called a counting frame, is a calculating tool that was in use in Europe, China and Russia, centuries before the adoption of the written Hindu–Arabic numeral system and is still used by merchants, traders and clerks in some parts of Eastern Europe, Russia, China and Africa.
http://history-computer.com/CalculatingTools/abacus.html -
The Difference Engine
A difference engine is an automatic mechanical calculator designed to tabulate polynomial functions. Most mathematical functions commonly used by engineers, scientists and navigators, including logarithmic and trigonometric functions, can be approximated by polynomials, so a difference engine can compute many useful tables of numbers.
www.computerhistory.org -
maddida
The MADDIDA was a special-purpose digital computer used for solving systems of ordinary differential equations. It was the first computer to represent bits using voltage levels and whose entire logic was specified in Boolean algebra. Invented by Floyd Steele, MADIDDA was developed at Northrop Aircraft Corporation between 1946-49 to be used as a guidance system for the Snark missile. http://www.computerhistory.org/revolution/analog-computers/3/159/441 -
The Eniac
was the first electronic general-purpose computer. It was Turing-complete, digital, and could solve "a large class of numerical problems" through reprogramming. Although ENIAC was designed and primarily used to calculate artillery firing tables for the United States Army's Ballistic Research Laboratory, its first programs included a study of the feasibility of the thermonuclear weapon. For more information visit https://en.wikipedia.org/wiki/ENIAC -
csirac
CSIRAC, originally known as CSIR Mk 1, was Australia's first digital computer, and the fifth stored program computer in the world. It is the oldest surviving first-generation electronic computer (The Zuse Z4 at the Deutsches Museum is older, but was electro-mechanical, not electronic), and was one of the first in the world to play digital music. -
The iphone
iPhone is a line of smartphones designed and marketed by Apple Inc. They run Apple's iOS mobile operating system. The user interface is built around the device's multi-touch screen, including a virtual keyboard. It has Wi-Fi and can connect to cellular networks. An iPhone can shoot video, take photos, play music, send and receive email, browse the web, and send and receive text messages. video games, reference works, social networking,can be enabled by downloading mobile apps
https://www.att.com
