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First Generation Computers
They were huge, slow, expensive, and often undependable. -
First Generation Computers
Presper Eckert, and John Mauchly built the ENIAC electronic computer which used vacuum tubes instead of the mechanical switches of the Mark I. -
Second Generation Computers
AT&T's Bell Laboratories regulated current or voltage flow and act as a switch for electronic signals. -
First Generation Computers
Vaccum tubes purpose was to act like an amplifier and a switch. -
First Generation Computers
Vacuum tubes could take very weak signals and make the signal stronger (amplify it). -
First Generation Computers
The ENIAC gave off so much heat that they had to be cooled by gigantic air conditioners. -
Third Generation Computers
Jack Kilby at Texas Instruments and Robert Noyce at Fairchild Semiconductor independently developed integrated circuits. -
First Generation Computers
Even with these huge coolers, vacuum tubes still overheated regularly. -
Second Generation Computers
Transistor was faster, more reliable, smaller, and much cheaper to build than a vacuum tube. -
Second Generation Computers
Computer manufactures developed operating systems that provided standardized routines for input, output, memory management, storage, and other resource management actiites. -
Second Generation Computers
Transistors were made of solid material, some of which is silicon, an abundant element (second only to oxygen) found in beach sand and glass. -
Second Generation Computers
Ran programming language compilers that allowed programmers to write instructions using English-like commands rather thanmachine language 1s and 0s. -
Second Generation Computers
Early proprietary operating systems developed by IBM and other computer manufacturers were designed tow ork only on a particular compuer model. -
Second Generation Computers
After programmers found themselves writing print routines over and over again, they began to look for a more efficient method to standardize such routines. -
Third Generation Computers
Integrated circuit, or as it is sometimes referred to as semiconductor chip. -
Third Generation Computers
Two of the first computers to incorporate itegrated circuits were the RCA Spectra 70 and the widly computers were filled. -
Third Generation Computers
Intergrated circuit packs a huge number of transistors onto a single wafer of silicon. -
Third Generation Computers
They could carry out instructions in billionths of a second. -
Third Generation Computers
The size of these machines dropped to the size of small file cabinets. -
Third Generation Computers
DEC introduced a succession of minicomputers that stole a share of the mainframe market. -
Fourth Generation Computers
Ted Hoff developed the first general-purpose microprocessor. -
Fourth Generation Computers
The Intel 4004 was a microprocessor that dramatically changed the computer industry. -
Fourth Generation Computers
Motorola released the 6800 8-bit microprocessor. -
Fourth Generation Computers
Zilog introduced the Z80 microprocessor. -
Fourth Generation Computers
Apple II was sold to the public.
