HCO

HCO may stand for:Harvard College Observatory, an astronomical research organizationHearing-Carry-Over, a type of Telecommunications Relay ServiceHubbard Communications Office, an organization in the Church of Scientology, formerly located at Saint Hill, best known for issuing policy letters (e.g., Fair Game)Bicarbonate Hydrogen carbonate AKA: BicarbonateHollister Co., sometimes abbreviated to HCO.
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Hollister Co. is an American lifestyle brand from parent Abercrombie & Fitch specializing in California Surfer apparel for individuals ages 14 through 18. Although established in 2000, Hollister Co. puts forth the date of its establishment as being 1922, and uses the number 22 and its logo (a flying Seagull) on many of its goods. Merchandise is sold through Hollister stores and its official website.
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Airport Name: Hallock Municipal Airport
Airport Location: Hallock, Minnesota, United States
IATA Code: HCO
ICAO Code: KHCO