David John Hacker (born 25 March 1964) is a British former field hockey player who competed in the 2000 Summer Olympics.

Jonathan Hacker is an electrical engineer at Teledyne Scientific and Imaging in Thousand Oaks, California, and was named Teledyne's Technologist of the Year in 2011. Hacker was named a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 2015 for his contributions to terahertz integrated circuits and devices.

Jacob Stewart Hacker (born 1971) is an American professor and political scientist. He is the director of the Institution for Social and Policy Studies and a professor of political science at Yale University.

<person, jargon> (Originally, someone who makes furniture with an axe) 1. A person who enjoys exploring the details of programmable systems and how to stretch their capabilities, as opposed to most users, who prefer to learn only the minimum necessary. 2. One who programs enthusiastically (even obsessively) or who enjoys programming rather than just theorizing about programming. 3. A person capable of appreciating hack value. 4. A person who is good at programming quickly. 5. An expert at a particular program, or one who frequently does work using it or on it; as in "a Unix hacker". (Definitions 1 through 5 are correlated, and people who fit them congregate.) 6. An expert or enthusiast of any kind. One might be an astronomy hacker, for example. 7. One who enjoys the intellectual challenge of creatively overcoming or circumventing limitations. 8. (Deprecated) A malicious meddler who tries to discover sensitive information by poking around. Hence "password hacker", "network hacker". The correct term is cracker. The term "hacker" also tends to connote membership in the global community defined by the net (see The Network and Internet address). It also implies that the person described is seen to subscribe to some version of the {hacker ethic}. It is better to be described as a hacker by others than to describe oneself that way. Hackers consider themselves something of an elite (a meritocracy based on ability), though one to which new members are gladly welcome. Thus while it is gratifying to be called a hacker, false claimants to the title are quickly labelled as "bogus" or a "wannabee". 9. (University of Maryland, rare) A programmer who does not understand proper programming techniques and principles and doesn't have a Computer Science degree. Someone who just bangs on the keyboard until something happens. For example, "This program is nothing but spaghetti code. It must have been written by a hacker". [Jargon File] (1996-08-26)

One who hacks; a person who performs her tasks with poor quality results.
Look at Steve's roofing job. It's a terrible wreck, a mess performed by the ultimate hacker.

A hacker is a person skilled in information technology who uses their technical knowledge to achieve a goal or overcome an obstacle, within a computerized system by non-standard means. Though the term hacker has become associated in popular culture with a security hackersomeone who utilizes their technical know-how of bugs or exploits to break into computer systems and access data which would otherwise be inaccessible to them – hacking can also be utilized by legitimate figures in legal situations.

True Orthodox church, True Orthodox Christians, True Orthodoxy or Genuine Orthodoxy, often pejoratively "Zealotry", designates groups of traditionalist Eastern Orthodox churches which have severed communion since the 1920s with the mainstream Eastern Orthodox churches for various reasons, such as calendar reform, the involvement of mainstream Eastern Orthodox Churches in ecumenism, or the refusal to submit to the authority of mainstream Eastern Orthodox churches. The True Orthodox church in the Soviet Union was also called the Catacomb Church; the True Orthodox in Romania, Bulgaria, Greece and Cyprus are usually called Old Calendarists.

David True (born 1942) is an American painter, born in Marietta, Ohio. He received a BFA from Ohio University in 1966 and an MFA from Ohio University in 1967.