Hit

The term hit can refer to any of the following:

• in marketing, a success involving (sudden) popularity of and demand for a particular item, such as a song that reaches the hit parade
• in archery and in target shooting, striking the exact desired spot, commonly the center of a target
• in recreational drug use, a single dose of a drug
• in baseball, the act of safely reaching first base after batting the ball into fair territory; see hit (baseball)
• a slang term for an assassination by an organized crime syndicate; see hitman
• in computer searches (e.g. using a search engine), an item found to match the specified search conditions
• in music, any song that makes the top 40 of the charts
• in genetic programming and other computer science optimisation techniques, a program scores a hit when its output is sufficiently close or equal to the target value for a particular test input; in some problems a program's fitness may be given by the number of hits it collects when run on the entire test set

As an acronym, HIT can mean:

• Hibernation Inducement Trigger, a chemical with potentially wide applications in organ transplantation and space travel
• Harbin Institute of Technology, one of the premier research universities in China
• in medicine, HIT denotes heparin-induced thrombocytopenia

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Hīt is also a town in Iraq