Io, IO, I/O, i/o, or i.o. may refer to:

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Other articles related to "io":

Lycoming IO-580
... The Lycoming IO-580 engine is a horizontally opposed, six-cylinder aircraft engine featuring three cylinders per side, manufactured by Lycoming Engines ... of the engine, which would have been designated O-580 and therefore the base model is the IO-580 ... This engine family competes with the Continental IO-550 series which are also six-cylinder engines with similar power output and weight ...
Lycoming IO-390 - Design and Development
... The engine was originally conceived in the 1970s as the IO-400-X, but the project was never pursued ... The IO-390 family of engines, which Lycoming refers to as the IO-390-X, produce 200 hp (149 kW) to 210 hp (157 kW) ... The IO-390 was developed from the similar IO-360 engine, by using cylinders from the IO-580 to increase the O-360's cylinder bore ...
Io, Norway
... Io is a village in Meland municipality, Norway. ...