+ 1977.j. Sony CF-950S
+ 2003.a. TC-TX1
+++ 1968. d. Sony TC-125 world's first deck ''compact-cassette'' recorder 
+++ 1968.a. Sony TC-50 = first ''compact-cassette'' voice recorder
++ 1991.b. Sony DTC-690
+++ 1992.c.c. Sony NTC - smallest audio cassette ever made
+++ 1992.c. Sony NT-1 -smallest digital cassette-recorder 
+++ 1994.c.c. Sony DTRS cassette
1995.e. Sony MHC-450
+ 1990.c. Sony CFM-2500 My First Sony
++ 1990(?).e. Sony WM-D6C
+++ 1976.f. Sony EL5
+++ 1976.f.c. caseta/cassette Elcaset 
++ 1967.b. Sony TC-12 = first japanese compact-cassette(TM) recorder
1996.b. Sony M-630V