+++ 1969.j. Olympus Zuiko Pearlcorder - world's 1st ''microcassette'' (TM) recorder 
++ 1981.h. Olympus Pearlcorder XR- smallest analogic radio-microrecorder
+++ 1962 (?).e. Vity CR-II - 1st(?) japanese cassette recorder
+++ 1971(?).h. Assmann Memocord K60
++ 1988.h. Toshiba KT-RS1 
+++ 1968.i. Grundig DeJur Mini-Memo /EN7
+++ 1968.a. Sony TC-50 = first ''compact-cassette'' voice recorder
+++ 1992.c. Sony NT-1 -smallest digital cassette-recorder 
+++ 1986.c. Dictaphone 4250 Exec
++ 1987.e. Sony WM-D6C
+ ca.1983.e. Toshiba KT-1350
1984.e. Sony WM-F45
++ 1977.i. Philips N2002
+ 1972.f. National Panasonic RQ-212 S
+ 1973.e. Dictaphone 10