*	ABI	Abort
Absolute Assembler	Absolute Cell Reference	Absolute Code
Absolute Coding	Absolute Loader	Absolute Value
Abstract	Abstract Class	Abstract Data Type
Abstract Syntax	Abstract Syntax Notation One	Abstract Syntax Tree
Abstraction	Accept	Access Mechanism
Activation Record	Active	Active Document
Active Master File	Active Object	Active Server Page
Active Server Pages	ActiveX	ActiveX Controls
ActiveX‎	Actual Parameter	Addition
Addressable Location	Advisory Lock	Algorithm
Alias File	Aliasing Bug	Alphanumeric
Alphanumeric Sort	API	Apothem
Append	Application Binary Interface	Application Program
Application Program Interface	Application Programming Interface	Arbitrary

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