+++ 1987 .d. caseta/cassette DAT = Digital Audio Tape
+ ca. 1995.b. DDS data cassette
+++ 1994.c.c. Sony DTRS cassette
+++ 1991.a. Philips DCC = Digital Compact Cassette
+++ 1980.l.c. Philips LDB 4401 - world's first digital minicassette
+++ 1962-3.f.c. 3M(Scotch) type 270
+++ 1962 (?).e.c. caseta/casette Vity
+++ 1967.l.c. Philips LFH 0001 = first minicassette(TM) in the world
+++ 1992.b. ADAT casssette
+++ 1966.f.c. caseta/cartridge Playtape 
+++ 1964.c.c. caseta/cassette Sanyo Magazine 
+++ 1992.c.c. Sony NTC - smallest audio cassette ever made
+++ 1986.c.c. Dictasette (picocassette)=smallest analog cassette
+++ 1976.f.c. caseta/cassette Elcaset 
+++ ca1973.g.c. Grundig Steno-cassette