

TERMINOLOGY GLOSSARY
 Binary: A numbering system that uses only 0s and 1s to represent data.
 Logic Gates: Electronic circuits that implement Boolean logic functions, such as AND, OR, and NOT.
 Registers: Digital electronic devices that store data and operate on it.
 Denary: A numbering system that uses base 10, also known as the decimal system.
 Overflow Error: A mathematical error that occurs when a calculation exceeds the maximum value that can be stored or represented.
 Hexadecimal: A numbering system that uses base 16, and uses 09 and AF to represent values from 0 to 15.
 Logical Binary Shift: An operation that moves all the bits of a binary number to the left or right, while preserving the sign of the number.
 Most Significant Bit(s): The leftmost bit(s) of a binary number, which have the highest place value.
 Two’s Complement: A method of representing negative numbers in binary by inverting all the bits and adding 1 to the result.
 ASCII: A character encoding system that represents text using 7 or 8 bits per character.
 Character Sets: Collections of characters and symbols that are used to represent text in computing.
 Unicode: A character encoding system that supports a wide range of languages and scripts, including emoji.
 Sound Sample Rate: The number of times per second that a sound signal is measured or sampled to create a digital representation.
 Sound Sample Resolution: The number of bits used to represent each sample of a sound signal.
 Analog: Signals that are continuous and vary smoothly over time.
 Pixel: Short for "picture element," a single point in a digital image.
 Image Resolution: The number of pixels in an image, usually measured as width x height.
 Image Colour Depth: The number of bits used to represent the colour of each pixel in an image.
 Data Compression: Techniques used to reduce the amount of data needed to store or transmit information.
 Lossy Compression: A type of data compression that reduces file size by permanently removing some of the data.
 Lossless Compression: A type of data compression that reduces file size without removing any data.
 Run Length Encoding: A simple form of data compression that replaces long runs of repeating data with a shorter code.
 Bandwidth: The amount of data that can be transmitted over a network or communication channel in a given amount of time.
ALSO IN THIS TOPIC
1.1.1 NUMBER SYSTEMS  Why Computers use Binary
1.1.2 NUMBER SYSTEMS  Binary, Hex and converting between number systems
1.1.3 NUMBER SYSTEMS  Benefits of Hex
1.1.4 NUMBER SYSTEMS  Binary Addition and Overflow
1.1.5 NUMBER SYSTEMS  Binary Shifts
1.1.6 NUMBER SYSTEMS  Negative Number Representation, Two's Complement
1.2.1 TEXT, SOUND AND IMAGES  How Computers Represent Text
1.2.2 TEXT, SOUND AND IMAGES  How Computers Represent Sound
1.2.3 TEXT, SOUND AND IMAGES  How Computers Represent Images
1.3.1 STORAGE AND COMPRESSION  How Data Storage is Measured
1.3.2 STORAGE AND COMPRESSION  Calculating Image and Sound File Size
1.3.3 STORAGE AND COMPRESSION  Purpose of Data Compression
1.3.4 STORAGE AND COMPRESSION  Lossy and Lossless, how files are compressed
TOPIC 1 KEY TERMINOLOGY
TOPIC 1 ANSWERS
TOPIC 1 TEACHER RESOURCES (CIE)
1.1.2 NUMBER SYSTEMS  Binary, Hex and converting between number systems
1.1.3 NUMBER SYSTEMS  Benefits of Hex
1.1.4 NUMBER SYSTEMS  Binary Addition and Overflow
1.1.5 NUMBER SYSTEMS  Binary Shifts
1.1.6 NUMBER SYSTEMS  Negative Number Representation, Two's Complement
1.2.1 TEXT, SOUND AND IMAGES  How Computers Represent Text
1.2.2 TEXT, SOUND AND IMAGES  How Computers Represent Sound
1.2.3 TEXT, SOUND AND IMAGES  How Computers Represent Images
1.3.1 STORAGE AND COMPRESSION  How Data Storage is Measured
1.3.2 STORAGE AND COMPRESSION  Calculating Image and Sound File Size
1.3.3 STORAGE AND COMPRESSION  Purpose of Data Compression
1.3.4 STORAGE AND COMPRESSION  Lossy and Lossless, how files are compressed
TOPIC 1 KEY TERMINOLOGY
TOPIC 1 ANSWERS
TOPIC 1 TEACHER RESOURCES (CIE)

