Medicine. 1  hs, medical abbreviation for hours of sleep. 2  h.s., medical abbreviation for the Latin phrase hora somni (at bedtime) 3  Hereditary spherocytosis, a genetic disorder marked by hemolytic anemia.  Hidradenitis suppurativa, a skin condition affecting apocrine sweat glands and hair follicles.
Anti-Defamation League. For other uses, see Anti-Defamation League (disambiguation). The Anti-Defamation League (ADL; formerly known as the Anti-Defamation League of B'nai B'rith) is an international Jewish non-governmental organization based in the United States.
Short for Access Control List, an ACL is a list containing one or more ACE which are used by an operating system or other network device to appropriately restrict the rights users have. For example, an ACL may specify if a user or the users group have access to a file or folder on that computer or network.