Planning, design and installation of drainage systems protecting structures against water in the ground
Edition 1990-06

Helical-scan video tape cassette system using 12,65 mm (0,5 in) magnetic tape on type VHS; part 3: S-VHS (IEC 60774-3:1993); German version EN 60774-3:1993
Edition 1994-05

Helical-scan video tape cassette system using 12,65 mm (0,5 in) magnetic tape on type VHS - Part 1: VHS and compact VHS video cassette system (IEC 60774-1:1994); German version EN 60774-1:1994
Edition 1994-07

Integrated Services Digital Network (ISDN); 3,1 kHz telephony teleservice; end-to-end compatibility requirements for telephony terminals; english version ETS 300082:1992
Edition 1992-06

Integrated Sevices Digital Network (ISDN); 3,1 kHz telephony teleservice; attachment requirements for handset terminals; english version ETS 300085:1990
Edition 1992-02