L5000 Accounting Machine
1970-1979
Olivetti Logos 270 electric printing calculator
circa 1970
Seiko combined wristwatch and electronic calculator
1978
The Preludin Calculator, for determining height-weight ratio, United Kingdom, 1955-1965
1955-1965
Hewlett Packard HP 9810A programmable desktop calculator
1971
Addiator "Arithma" Calculator
1960-1965
Key-Set Mechanical Calculator
1920-1940
Commodore 774D Calculator
1973-1975
Curta Type 2 Cylindrical Calculator
1959
Circular Colliery Ventilation Officer's calculator
Advance Mini Executive pocket electronic calculator
1972
Curta model 1 rotary calculator
1955-1965
Textile calculator made by Fowler Ltd
1910-1914
Addo adding machine model 16
1940-1959
Electro-mechanical calculator by Carl Walther
1935-1945
Commodore personal minicomputer (electronic calculator). Model 796M
circa 1979
Radiac slide rule by Blundell Rules Limited
1960-1972
Prinztronic SC1500M electronic calculator
circa 1980
Multi-function preprogrammed Scientific notation calculators
1975
Fuller cylindrical calculator on stand made by W. F. Stanley & Co. Ltd
circa 1940
Brother Procol 508AY
circa 1977
Bell Punch "Anita" Electronic Calculator
1969-1971
Hitachi KK562 electronic desktop calculator
Mechanical Calculator
1915-1925
Solar-powered electronic calculator
1990
Casio HL-807 Calculator
1980
Isotope handling calculator
1950-1975
Sumlock 324G Scientist Calculator
1970-1975
Sinclair "Cambridge" Calculator
1975
Integrator Unit from Hartree Differential Analyser
1936
Elsimate EL-8015
circa 1978
Sharp Electronic Calculator
1965-1975
Rotating Calculator
1922-1927
Casablancas Textile Twist Calculator
1900-1930
Mechanical Calculator
1915-1925
EL-112
circa 1976
Brunsviga lever set calculator
1910
Comptometer 993e electric calculator
1955-1965
Isotope calculator designed by AERE
1960
Mechanical Calculator
1925-1935
Elsimate Compet EL-8100 Calculator
1975-1980
Mechanical Calculator
1900-1905
Mechanical Calculator
1885-1895
HP 35 Electronic Calculator
1973
Rockwell 41OP electronic printing calculator
Key-Set Mechanical Calculator
1950
Protein & Calorie Calculator for Caterers
1980-1995
HP 55
1974
Key-Set Mechanical Calculator
1945
Portable Electronic Calculator
1970