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1

decimal number system

a base 10 number systen that uses 10 different characters to represent values; each place value is the number 10 raised to a certain power

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2

binary number system

a base 2 number system that uses 2 different characters to represent values; each place value is the number 2 raised to a certain power

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3

bit

a single 0 or 1 in a binary number; short for binary digit

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4

nibble

a group of four bits

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5

byte

a group of eight bits

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6

kilobyte

a group of one thousand bytes or eight thousand bits

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7

megabyte

a group of one million bytes or eight million bits

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8

gigabyte

a group of one billion bytes or eight billion bits

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9

terabyte

a group of one trillion bytes or eight trillion bits

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10

overflow error

a programming error that occurs when attempting to represent a number that is too large

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11

underflow error

a programming error that occurs when attempting to represent a number that is too small

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12

round-off error

a programming error that results from attempting to represent a number that is too precise in binary

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13

ASCII

American Standard Code for Information Interchange

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14

American Standard Code for Information Interchange

a 7-bit encoding scheme for commonly used English letters, numbers, and symbols

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15

Unicode

an international encoding scheme that represents more than 65,000 characters from numerous languages, numbers, symbols, and emoji

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16

analog

continuous streams or waves of data, such as light waves, sound waves; real, tangible things

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17

digital

sampled, non-continuous data

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18

sampling

a process for creating a digital representation of analog data by measuring the analog data at regular intervals (called samples)

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19

pixel

a tiny element of a screen that can produce a color; short for picture element

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20

RGB triplet

three values that affect the brightness of the red, green, and blue portions of a pixel; usually represented in decimal, binary, or hexadecimal

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21

full color

colors represented with 24 bits, allowing for more than 16 million different colors

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22

data compression

a reduction in the number of bits needed to represent data

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23

lossless compression

a reversible process that reduces the number of bits in a digital file without losing any data

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24

lossy compression

a non-reversible process that reduces the number of bits in a digital file by discarding some of the data and informa

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