+++ 1962(ca).k.c. Reditune - endless cartridge
+++ 1987 .d. caseta/cassette DAT = Digital Audio Tape
+++ 1958.a.c.- caseta/cassette pt/for Saba TKR15 radiorecorder
+++ 1963 a.c. Philips EL 1903 - first compact-cassette(TM) model
+++ 1971.e.c. Hipac - japanese endless cassette/cartridge inspired from Playtape
+++ 1980.l.c. Philips LDB 4401 - world's first digital minicassette
+++ 1967.m.c Muntz Mini-Twin Stereo pak MT-E106
+++ 1944(?).a.c. Cosmos Industries MX-303A/ANQ-1 - wire cart
+++ 1942.a. Textophon BW4 I - first audio cassette-3rd variant 
+++ 1962-3.f.c. 3M(Scotch) type 270
+++ 1962 (?).e.c. caseta/casette Vity
+++ 1967.l.c. Philips LFH 0001 = first minicassette in the world
+++ 1955.a.c. caseta/cassette Midgetape RL
+++ 1992.b. ADAT casssette
+++ 1966.f.c. caseta/cartridge Playtape