Eli Whitney is sometimes credited with developing the armory system of manufacturing in 1801, using the ideas of division of labor, engineering tolerance, and interchangeable parts to create assemblies from parts in a repeatable manner.

* 1765 – Eli Whitney, American inventor ( d. 1825 )

Eli Whitney ( December 8, 1765 – January 8, 1825 ) was an American inventor best known for inventing the cotton gin.

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* 1795 – Eli Whitney Blake, American inventor ( d. 1886 )

* 1895 – Eli Whitney Blake, Jr., American scientist ( b. 1836 )

About the same time, innovators like Eli Whitney ( 1765 – 1825 ), James Watt ( 1736 – 1819 ), and Matthew Boulton ( 1728 – 1809 ) developed elements of technical production such as standardization, quality-control procedures, cost-accounting, interchangeability of parts, and work-planning.

* 1794 – Eli Whitney is granted a patent for the cotton gin.

* December 8 – Eli Whitney, American inventor ( d. 1825 )

* March 14 – Eli Whitney is granted a patent for the cotton gin.