CPC file extensions
| Extension | Explanations | Programs that use this extenstion |
| $$$ | Temporary Amsdos file | Amsdos |
| 128 | Soundtrakker 128KB music file]] | Soundtrakker |
| 64K | FutureOS Main-memory program | FutureOS |
| ACE | Packed Windows archive | ACE |
| ASC | ASCII text | |
| ASM | Assembler source code | |
| AYC | Derivate or converted YM music file | |
| BAK | Backup file | |
| BAS | Basic program | |
| BAT | Batch-File | |
| BIN | binary file | |
| CCP | Key definition for CP/M Plus | CP/M 3.0 |
| COM | Executable CP/M program | CP/M |
| CUT | AMX Pagemaker Clipart | AMX pagemaker |
| DD | Device driver for GSX (CP/M Plus) | CP/M 3.0 |
| DSK | Disc image | |
| DEU | DEU German text | |
| ENG | English text | |
| EXE | EXE Executable file, SymbOS | SymbOS |
| FLD | Map file of a game |
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FNT Font of AMX Pagemaker
FRA French text
GEs Set of Graphic-elements
H C variable definitions
HED Header/Icon definition for FutureOS (Source).
HGB FutureOS Background Picture
HLP Help file (text)
INF AMX Pagemaker site (Info)
INS Soundtrakker Instrument file
MAC Makroassembler source code
MAX Maxam Source Code
MDL Digitracker Module
MOD Crown Protracker Module or Amiga MOD File
MP3 FutureOS MP3 Sound file
OBJ Object Code
OVL Overlay parts of WordStar o.e.
PA1 AMX Pagemaker site (Teil 1)
PA2 AMX Pagemaker site (Teil 2)
PA3 AMX Pagemaker site (Teil 3)
PA4 AMX Pagemaker site (Teil 4)
PAL OCP Art Studio Palette
PAS (Turbo-)Pascal source code
PRL page relocatable file
PRV AMX Pagemaker site (Preview)
RAR Packed Windows Archive
ROM Rom-File (16K)
SAV SOS screen saver
SCR OCP Art Studio Screen
SGX SOS graphic
SKM compilated Starkos Module
Skr Set of Scripts
SKS STarKos Module
SMC Executable C Program for FutureOS
SNA Emulator Snapshot 64/128KB
SND Soundtrakker 64KB Music
Spr Set of Sprites
ST2 Compilated Soundtrakker 128 Module
SUB Submit/Batch file (CP/M)
TAP Emulator tape image
TXT ASCII text
VID SOS video
WIN OCP Art Studio Clip
WP Key definition for WordStar
X16 FutureOS Expansion RAM program
YM YM Music file
ZIP Packed Windows archive