1) Wireless acronym 
In radio, multiple-input and multiple-output, or MIMO (pronounced as `my-moh` and/or `me-moh`), is the use of multiple antennas at both the transmitter and receiver to improve communication performance. It is one of several forms of smart antenna technology. MIMO technology has attracted attention in wireless communications, because it offers ...
(from the article `GIS`) ...of the computer in the 1950s brought another essential component of GIS. By 1959 the American geographer Waldo Tobler had developed a simple model ...
Multiple Input, Multiple Output, details ...
Multiple Input, Multiple Output
multiple-in multiple-out. Techniques which use transmission of the same information by multiple transmitters and multiple receivers, a form of inverse multiplexing. In mobile communications this works with multiple transmit and receive antennas (antenna diversity) to exploit multipath effects. 3GPP HSDPA uses MIMO together with HARQ (hybrid ARQ). SIMO (single-in multiple out) and MISO (multiple-in single-out) are simpler diversity techniques using a single transmitter and a single receiver, respectively.
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Multiple-Input Multiple-Output