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12 Cards in this Set
- Front
- Back
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what is a computer system?
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-group of devices
-programmed with a set of instructions -accept raw data (input) -process into useful information (output) |
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what is hardware?
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electric, electronic, and mechanical components used in processing data
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what is software?
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set of intructions that enable hardware to process info
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what is cpu?
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central processing unit
-brain -where data is transformed into info |
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name and describe 4 classifications of computers
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1) microcomputers - small, single user, and least expensive
2) Mainframe - consists of host and user terminals 3)supercomputer - fast and expensive -> computer animation 4) Network of microcomputers - users may work locally or in the shared network environment |
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what is the smallest unit of storage ?
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a bit
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what is a computer word size?
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the number of bits which the cpu can manipulate at once - depends on size of the cpu registers and data bus lines
-starts with eight-bit (1 byte) and doubles till 8 bytes |
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how many bits does nbits generate?
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2^n different bits
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what is BCD?
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binary coded decimal
-developed by ibm -6bit -only uppwercase characters, numbers some symbols represented |
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what is EBCDIC?
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Extended Binary Coded Decimal Interchange Code
-8bit -representing up to 256 characters |
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what is ASCII?
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American Standard Code for Information Interchange
-improved to 8bit from 7bit -developed by ANSI (American National standardes Institute) |
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what is Latin 1?
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appends 128 additional codes to the original ascii 128
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