In the phonetic alphabet, Kilo represents the letter K. According to my dictionary, kilo is 1. kilogram 2. kilometer - [which I personally find confusing since to me those are two different things.]
Wikipedia gives this definition: Kilo- (symbol: k, lowercase) is a unit prefix in the metric system denoting multiplication of the unit by one thousand... The kilo prefix is derived from the Greek word χίλιοι (chilioi), meaning thousand. It was originally adopted by Antoine Lavoisier's group in 1795, and introduced into the metric system in France with its establishment in 1799.
Kilo might also refer to a district (of which there are 50!!!) of Espoo, a large city in Finland. Kilo is a place of homes and small industry. The head police station of Espoo is located in Kilo. Unfortunately there is a shortage of services in Kilo and for example to visit the post office or the pharmacist one would have to go to neighbouring district Leppävaara or the neighbouring municipality of Kauniainen.
Hands down the most interesting kilo is the kilo class submarine, a diesel-electric submarine that is made in Russia. The original version of the vessels were designated Project 877 Paltus (Halibut) in Russia. There is also a more advanced version, designated as Improved Kilo [now that's imaginative].
The Kilo class was to have been succeeded by the Lada Class. In November 2011 the Russian Navy announced that the Lada class will not enter service because trials with the lead boat of the new class, Sankt Peterburg (B-585) had shown major deficiencies. Construction of two further boats has been suspended.
The boats are mainly intended for anti-shipping and anti-submarine operations in relatively shallow waters. Original Project 877 boats are equipped with Rubikon MGK-400 sonar system,which includes a mine detection and avoidance sonar MG-519 Arfa. Newer Project 636 boats are equipped with improved MGK-400EM, with MG-519 Afra also upgraded to MG-519EM. The improved sonar systems have reduced the number of operators needed by sharing the same console via automation.