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History of Computers
Transcript of History of Computers
Designed to help the army calculate how to shoot artiliary 1945: First general-purpose electronic computer Roman abacus was used in
Babylonia as early as 2400 BC 1801: punched card technology Joseph-Marie Jacquard developed a loom in which the pattern being woven was controlled by punched cards The ENIAC computer was VERY LARGE And it used LOTS of energy, 150,000 watts (a lightbulb uses about 60 watts) Earliest Calculator Machines First Electronic Computers First PCs, or Personal Computers These computers used "Vacuum Tubes" to store information How many are your works, LORD!
In wisdom you made them all;
the earth is full of your creatures. Psalm 104:24 Computer Bugs? Vacuum tubes glow and moths used to fly into the computers and short circuit them. This is where the term computer "Bugs" comes from. The Transistor Electricity Benjamin Franklin proved that lightning was electrical in nature in his kite experiment in 1752. Discoveries The first true electric battery was built in 1779. Alessandro Volta. Thomas Edison invented the electric lightbulb in 1879 Batteries The transistor was one of the most important breakthroughs in the history of computing Much smaller than vacuum tube Uses no energy until used and much lower than vacuum tube Nearly 100% reliable Curta Calculator 1948 Early PCs 1976 1983 $9,997 1975 Macintosh 1984 The Big Three Apple
Microsoft Windows Modern Computers 1980 Apple Back On Top iMac
iPhone IBM/Microsoft Windows IBM's OS/2 Warp Notable Developments Mouse Internet First Mouse by Douglas Engelbart in 1964 Apple Computer Macintosh mouse Modern Wireless Mouse Beginings of the internet were found in a project called ARPANET in 1958. It was developed as a network of radar installations to monitor and protect us from USSR space and military power. 1991 the network went public as the "world wide web" Modems were used to connect computers to the internet network using existing phone lines. Common speeds were 14.4Kbps-56Kpbs.
Current high speed internet uses the same phone lines, cable tv lines, satelite, or wireless. Speeds are anywhere from 100Kbp to 10,000Kbs. Most DSL internet is about 756Kbs. Computer Terms/Parts History of Computers Motherboard
Components Terms Binary - on or off, 1 or 0
Bit - one recorded 0 or 1
Byte - 8 Bits
kB (kilobyte) - 1024 bytes
MB (Megabyte) - 1024 kBytes
GB (Gigabyte) - 1024 MBytes
TB (Terabyte) - 1024 GBytes
PB (Petabytes) - 1024 TBytes Floppy Drive
4Pin Power Connector
SATA Power Connector
SATA Drive Connector
VGA Video Port
DVI Video Port
HDMI Video/Audio Port
Ethernet Network Port