Time clock

A time clock, sometimes known as a clock card machine or punch clock or time recorder, is a mechanical (or electronic) timepiece used to assist in tracking the hours worked by an employee of a company.

History of time clocks

20th century

• 
  Time clock, 1909
• 
  Time clock, 1909
• 
  Time stamp, 1909
• 
  1909
• 
  1920
• 
  1928/2010
• 
  1942/43
• 
  1942/43
• 
  1942/43
• 
  1946
• 
  1948

Early clocks in musea, undated

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21st century

• 
  2008
• 
  2011

Time clocks in practice

• 
  1940
• 
  1948
• 
  1946
• 
  1973
• 
  1973
• 
  1973

See also

• Cost accounting
• History of accountancy