MWI is the country code for Malawi in several country code systems.

MWI may also refer to:

Science and technology

• Many-worlds interpretation, in quantum mechanics
• Message-waiting indicator, in telephony
• Mobile Web Initiative, in Mobile Web
• Maths Week Ireland, an all-island (Republic of Ireland and Northern Ireland) mathematics outreach initiative

Other uses

• Ministry of Water and Irrigation, in Water supply and sanitation in Jordan
• Warsaw Modlin Airport (IATA: WMI)
• Mountain Warfare Instructor, in Mountain Warfare Training Center

See also

• MW-1

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