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It only performed addition and never worked.
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The Stepped Reckener first add, subtract, multiply, divide & square roots it was ahead of it’s time.
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Ada Byron was the first female programmer.
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It followed programs on punched cards and was designed to make decisions based on programs. It never built but it was model for today.
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John Von Neumann had the idea of stored program in CPU to control all functions.
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ABC was the first electronic computer and used the binary number system of 1s and 0s that is still used today.
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It used punch cards, but could not make decisions so it was still a calculator, but it was 51 feet in length and weighted 5 tons.
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wireless technology used to allow mobile computer devices to communicate
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Transistor was invented to make computers smaller and less expensive.
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UNIVAC was used to store program concept correctly andwas the first computer language (C-10) with the first keyboard. It was sold to Census Bureau in 1951 and is still large and expensive.
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Created a BASIC language interpreter (1975)
Founded Microsoft (1977)
Developed MS-DOS for PCs and Windows -
approx. 1 million bytes
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Machine Language ( 0’s & 1’s ) was the only language that a computer understand.
https://en.wikipedia.org/wiki/Machine_code -
It replaced the transistors, it was the fastest,and it could make millions of calculations per second.
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Large & Expensive ($100,000-millions range)
Large corporations, banks, governments & universities
Usually has ‘dummy’ terminals
Usually requires their own room
IBM System 360 was one of first
A smaller ‘minicomputer’ was also used on a smaller scale
Eventually MICROcomputers became common
https://en.wikipedia.org/wiki/Mainframe_computer -
(Beginner’s All-Purpose Symbolic Instruction Code) uses an interpreter so code can be tested as it is written
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Entire CPU on a chip
Made Microcomputers (computer small enough to fit on a desktop) possible -
Hardware – the physical/touchable ‘equipment’ on a computer (monitor, keyboard, memory CHIPS, etc.)
Software – the programs running
Operating System Software – programs that run automatically when turned on & controls the computer use (i.e. DOS/Windows)
Applications Software – performs specific tasks (word processor, games, etc.) https://en.wikipedia.org/wiki/Software -
world wide (very large) network
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Be able to identify hardware of the PC (monitor, keyboard, mouse, disk drives, etc.)
Input Devices (Takes information in) vs. Output Devices (Sends information out)
CPU (Central Processing Unit) processes data and controls flow of data (heart) & directs all activities of the computer
ALU (Arithmetic Logic Unit) within the CPU for arithmetic and logic/comparisons (brain) -
Internet services (ISP) & online information services (i.e. AOL) offer access and information to and on the Internet
Telecommunications – transmitting and receiving of data
Kbps (KB per sec.) or Mbps (MB per sec.)
Modems transfer 0s and 1s into tones
WWW – most widely used Internet service
Browsers (i.e. Internet Explorer) GUI for info
