ZI or Zi may refer to:
Zinedine Yazid Zidane O.L.H., A.O.M.N. (French pronunciation: [zinedin zidan]; born 23 June 1972), nicknamed "Zizou", is a French professional football coach and former player who last managed Real Madrid.
ZIP Codes are a system of postal codes used by the United States Postal Service (USPS) since 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.
Zinc is a chemical element with symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table.
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.
The Z80 CPU is an 8-bit based microprocessor. It was introduced by Zilog in 1976 as the startup company's first product.
The Zimbabwean dollar (sign: $, or Z$ to distinguish it from other dollar-denominated currencies) was the official currency of Zimbabwe from 1980 to 12 April 2009. During this time, it was subject to periods of above-average inflation, followed by a period of hyperinflation.