zero-cost
91Laws of Technical Systems Evolution — The Laws of Technical Systems Evolution are the most general evolution trends for technical systems discovered by TRIZ author G. S. Altshuller after reviewing thousands USSR invention authorship certificates and foreign patent… …
92Open-source hardware — RepRap general purpose 3D printer that not only could be used to make structures and functional components for open design projects but is an open source project itself. RepRap is also being designed with the ability to make copies of itself …
93Adams motor — Perpetual motion machine name=Adams motor topics=physics and electrical engineering claims= Over unity device capable of producing more energy than is supplied to it and being a technology that would or could provide energy at greater than 100%… …
94Quadraphonic sound — 4 channels Quadraphonic label Quadraphonic (or Quadrophonic sometimes Quadrasonic) sound – the most widely used early term for what is now called 4.0 surround sound – uses four channels in which speakers are positioned at the four corners of the… …
95Critical section — In concurrent programming a critical section is a piece of code that accesses a shared resource (data structure or device) that must not be concurrently accessed by more than one thread of execution. A critical section will usually terminate in… …
96Spy Sweeper — Infobox Software name = Spy Sweeper caption = Screenshot of Spy Sweeper version 5.5.7.47 developer = Webroot Software latest release version = 5.8.1.55 latest release date = release date|2008|08|18 operating system = Microsoft Windows genre =… …
97Hinton Battle — Infobox actor name = Hinton Battle imagesize = 180px caption = birthname = birthdate = birth date and age|1956|11|29 birthplace = Neubrücke, Hoppstädten, West Germany occupation = Actor, dancer, choreographer spouse = yearsactive = website =… …
9825 de Abril Bridge — Infobox Bridge bridge name= 25 de Abril Bridge View from Cristo Rei (south bank) official name= Ponte 25 de Abril carries= Six road lanes Two train tracks crosses= Tagus river locale= Lisbon, Portugal (right bank) Municipality of Almada (left… …
99Guerrilla publishing — is a catchall term that encompasses many different low budget efforts at self publishing and micro publishing. Some restrict the use of the term to mean only the publishing of books and pamphlets by employees who use their employers office… …
100Ambient intelligence — In computing, ambient intelligence (AmI) refers to electronic environments that are sensitive and responsive to the presence of people. Ambient intelligence is a vision on the future of consumer electronics, telecommunications and computing that… …
