Hewlett Packard HP 9810A programmable desktop calculator
1971
Olivetti Logos 270 electric printing calculator
circa 1970
Rockwell 41OP electronic printing calculator
Integrator Unit from Hartree Differential Analyser
1936
Addiator "Arithma" Calculator
1960-1965
Seiko combined wristwatch and electronic calculator
1978
Key-Set Mechanical Calculator
1950
Bell Punch "Anita" Electronic Calculator
1969-1971
Rotch true-wind calculator, for use at sea
1903
"Posographe" photographic exposure calculator
Protein & Calorie Calculator for Caterers
1980-1995
Monroe 360/65 bond trader
1976
Isotope calculator designed by AERE
1960
Commodore personal minicomputer (electronic calculator). Model 796M
circa 1979
Prinztronic SC1500M electronic calculator
circa 1980
Addo adding machine model 16
1940-1959
Brother Procol 508AY
circa 1977
EL-112
circa 1976
Elsimate EL-8015
circa 1978
HP 55
1974
Multi-function preprogrammed Scientific notation calculators
1975
Lloytron Accumatic 340 with case, s/n 102904, 1976
1976
Novus 4515 Mathematician PR with case, s/n 1008015
Sharp EL-8010 with case s/n 50800247, 1973
1973
Hewlett-Packard 55 with case, s/n 1503S01963, 1975
1975
Rotating Calculator
1922-1927
Mechanical Calculator
1925-1935
Mechanical Calculator
1915-1925
Sharp Electronic Calculator
1965-1975
Fuller cylindrical calculator on stand made by W. F. Stanley & Co. Ltd
circa 1940
Textile calculator made by Fowler Ltd
1910-1914
L5000 Accounting Machine
1970-1979
Mechanical Calculator
1915-1925
Solar-powered electronic calculator
1990
Commodore 774D Calculator
1973-1975
Casablancas Textile Twist Calculator
1900-1930
Hitachi KK562 electronic desktop calculator
Elsimate Compet EL-8100 Calculator
1975-1980
Brunsviga lever set calculator
1910
HP 35 Electronic Calculator
1973
Casio HL-807 Calculator
1980
CASIO AL-2000 programmable calculator presented to GE Perry
Circular Colliery Ventilation Officer's calculator
HP22
1975
Electro-mechanical calculator by Carl Walther
1935-1945
Commodore C110, with case s/n G1095, 1971
1971
Graphic Icon Organiser
1996
Novus 6035 Statistician PR with case, s/n 1008291
Hewlett-Packard 25
1975
Advance Mini Executive pocket electronic calculator
1972