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Calculators: Casio Computer Company Ltd. (Japan)
Familiar Japanese calculator company that survived the price cutting of the 1970s and is still around today.  Who didn't own a Casio? Their distinctive designs are easy to recognise, the high quality still shows through. There is a very confusing numbering system with a "street name" and a code number - so both are listed when they used them.  Check out the early range of horizontal calculators - fine if you were right handed but I imagine difficult to use if you were left handed.    They also made branded calculators for the UK department store Boots

 
101-MR

121-MR

103-MR

805-MR

J-1 J-3
101-MR
1974
121-MR
1975
103-MR
1976
805MR
1976
J-1
J-811
1978
J-3
J-1211
1978
memory-8A AL-8 AL-8S AL-10 Pocket 8S Biolator H-802 H-813 H-813B H-813C

Memory A-1

Memory-8A
CD-813
1975
AL-8
1976
AL-8S
1976
AL-10
1976
Pocket-8S
H-800
1975
Biolator
H-801
Personal-I
H-802
1976
 Personal M-1
H-813

1977
Personal M-1
H-813B
Personal M-1
H-813C
Memory A-1
H-814
1977
Memory B-1 H-1 H-3 Pocket-mini P-811 FX-29
Memory B-1
H-816
H-1
1978
H-3
1984?
Pocket-mini
P-811
1976
FX-29
1977
 
CM-602 CM-604 Personal Mini Personal mini cm-607 Mini memory Mini memory
Mini
CM-602
1973
Mini
CM-604
1974
Personal-Mini
-----

1974
Personal-Mini
CM-607
1974
Mini Memory
Type I
1974
Mini Memory
Type II
1974
Mini-8 Memory 8R CQ-1
Mini-8
Y-800
1975
Memory 8R
Y-811
1975
CQ-1
1977
S-1(B)
S-1(B)
1986?