Project saved by Super Project Analyzer, a program that analyzes software development projects; contains information about files, procedures, constants, variables, data types and enums.

SUD files track file usage within a project. The program determines which files are necessary and which are not. Project elements are then labeled as "Included," "Shared," "Used," or "Dead."

Puzzle created for Sudoku software; contains numbers arranged in grids; may be opened by various Sudoku games and Sudoku puzzle solving programs; also used by some Java-based Sudoku applets available on the Web.