.Y File Extension

Developer file used by Yacc (Yet Another Compiler-Compiler), a program used to generate source code parsers; contains formal declarations for how a programming language is defined; used for generating parsers for various languages.

NOTE: Yacc has been used for creating the parser for the C programming language.

File archive compressed using Amiga Yabba compression, a type of compression used only on Amiga systems.

One of three files from a split .PPM file; others are .U and .V files; YUV representation is used by the Stanford MPEG codec.