The file "sc25550-XCOMTFTDv21.rar" appears to be a compressed archive file, specifically in the RAR format. RAR files are commonly used for data compression and archiving. The naming convention suggests that it might be related to XCOM, a popular turn-based strategy video game.
LINKS:
Elli - eine Geschichte aus dem Berlin der 1970er Jahre
Ostwind - Insel- und Heimatgeschichte
Die Kanutour
Tagebuch