Obscure C64 textmode software from 83/84. Microtel 600 was for videotex (Viditel in the Netherlands) and telesoftware (software that you download through teletext). Com-In seems to be for radio communication (RTTY) and other things. The software at the top (PA3ASM) is some sort of assembler or machine code monitor?
Pics from here. Thanks to Akira for the suggestion.