- PC- Software - DOS - Commands - External (.COM and .EXE programs)

Commands: Internal

APPEND    Sets a search path for data files ASSIGN Assigns a drive letter to a different drive ATTRIB Sets or displays file attributes BACKUP Backs up one or more files from one disk to another CHKDSK "Check Disk" : Scans the disk in the specified drive and checks for errors COMMAND Starts a new command processor (COMMAND.COM) COMP Compares the contents of two sets of files DEBUG Utility for debugging programs DEFRAG Defragments the specified drive (joins file-fragments) DISKCOMP Compares disks DISKCOPY Copies disks DOSSHELL Text-mode user-interface and file manager EDIT Full screen text editor EDLIN Primitive text line editor EXE2BIN Converts executable (.exe) files to binary format (.com, .bin, etc) FASTOPEN Decreases the time needed to open frequently used files and directories FC "File Compare" : Compares files and displays differences FDISK Prepares (partitions) hard disks for FORMAT FIND Searches for a specified text-string in a specified file - outputs text-lines with match FORMAT Formats a disk with an empty File Allocation Table (FAT) - ready to receive files GRAFTABL Loads a table of graphics characters GRAPHICS Prepares MS-DOS for printing graphics HELP Online documentation for MS-DOS commands JOIN Joins a disk drive to a path KEYB Loads a keyboard program LABEL Labels disks LINK Links program-modules (.obj files) into executable code MEM Displays memory information MODE Sets or displays operation modes for devices MORE Displays output one screen at a time MSD "Microsoft Diagnostics" : analyses and displays computer equipment and settings NLSFUNC "National Language Support Functions" : Loads country specific information PRINT Prints files QBASIC Basic program development environment - and interpreter RECOVER Attempts to recover a bad disk or file REPLACE Replaces files with newer versions RESTORE Restores backed up files SELECT Installs MS-DOS on a diskette with country-specific settings SHARE Installs file sharing and locking - preventing damage from simultaneous use SORT Sorts text lines in a file SUBST Substitutes a string for a path SYS Transfers MS-DOS system files on a specified drive TREE Displays directory and file names XCOPY Copies files and subdirectories