ZI or Zi may refer to:
A ZIP Code is a postal code used by the United States Postal Service (USPS) in a system it introduced in 1963. The term ZIP is an acronym for Zone Improvement Plan; it was chosen to suggest that the mail travels more efficiently and quickly (zipping along) when senders use the code in the postal address.
Zimbabwe (), officially the Republic of Zimbabwe, is a landlocked country located in southern Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa, Botswana, Zambia and Mozambique.
Zinedine Yazid Zidane ([zinedin zidan]; born 23 June 1972), nicknamed "Zizou", is a French professional football coach and former player.
Zinc is a chemical element with symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table.
The Z80 CPU is an 8-bit based microprocessor. It was introduced by Zilog in 1976 as the startup company's first product.
Ziva David (; Hebrew: זיוה דוד, pronounced [ˈziva daˈvid], Ziva: "Radiance"; birth date November 12, 1982, Beersheba in the Negev desert of southern Israel) is a fictional character from the CBS television series NCIS, portrayed by Chilean-born American actress Cote de Pablo.
ZIP is an archive file format that supports lossless data compression. A ZIP file may contain one or more files or directories that may have been compressed.