文件类型1：Sudoku Puzzle File
文件说明：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.
Kojens Sudoku CAD
文件类型2：Super Project Analyzer File
文件说明：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.
WindowsAivosto Super Project Analyzer