Series 1900 or 1900 series may refer to:

ICT 1900 series of mainframe computers Cisco 1900-series switch for computer networking FEVE 1900 series, a Spanish meter-gauge dual-mode locomotive Series 1900 dollar bills of the United States; see History of the United States dollar Series 1900 leu coins of Romania; see Coins of the Romanian leu

See also

1900 world series of American baseball 1900 (disambiguation)