National 3000 automatic bookkeeping calculating machine
1935-1945
Circular Colliery Ventilation Officer's calculator
Textile calculator made by Fowler Ltd
1910-1914
HP 55
1974
Graphic Icon Organiser
1996
Four-function pocket calculator by Texas instruments
Adler Type EC60 four-function pocket calculator
1970-1980
Prinztronic MC85 hand-held electronic calculator
1972
Olivetti Logos 270 electric printing calculator
circa 1970
Hitachi KK562 electronic desktop calculator
Curta model II
1950
Monroe 360/65 bond trader
1976
Fuller cylindrical calculator on stand made by W. F. Stanley & Co. Ltd
circa 1940
Mechanical Calculator
1915-1925
Bell Punch "Anita" Electronic Calculator
1969-1971
"Posographe" photographic exposure calculator
Solar-powered electronic calculator
1990
Rotating Calculator
1922-1927
Addiator "Arithma" Calculator
1960-1965
Mechanical Calculator
1915-1925
Key-Set Mechanical Calculator
1950
Mechanical Calculator
1925-1935
Commodore personal minicomputer (electronic calculator). Model 796M
circa 1979
Prinztronic SC1500M electronic calculator
circa 1980
EL-112
circa 1976
Brother Procol 508AY
circa 1977
Lloytron Accumatic 340 with case, s/n 102904, 1976
1976
Sharp EL-8010 with case s/n 50800247, 1973
1973
Novus 4515 Mathematician PR with case, s/n 1008015
Hewlett-Packard 55 with case, s/n 1503S01963, 1975
1975
Integrator Unit from Hartree Differential Analyser
1936
Sharp Electronic Calculator
1965-1975
Rotch true-wind calculator, for use at sea
1903
Casablancas Textile Twist Calculator
1900-1930
Commodore 774D Calculator
1973-1975
L5000 Accounting Machine
1970-1979
Isotope calculator designed by AERE
1960
Addo adding machine model 16
1940-1959
Elsimate EL-8015
circa 1978
Multi-function preprogrammed Scientific notation calculators
1975
Seiko combined wristwatch and electronic calculator
1978
Hewlett Packard HP 9810A programmable desktop calculator
1971
Olivetti Logos 270 electric printing calculator
circa 1970
Rockwell 41OP electronic printing calculator
Texas Instruments TI-51-III Statistical Electronic Calculator
circa 1975
Olivetti Ivrea - divisuma 24 Calculator
Gestation calculator used by field workers in the Institute for Social Studies in Medical Care
1976
Gestation calculator used by field workers in the Institute for Social Studies in Medical Care
1976
Adding machine/tape punch
