removable without much difficulty
81Octant (instrument) — Octant. This instrument, labelled Crichton London, Sold by J Berry, Aberdeen, appears to have an ebony frame with ivory scale, vernier and signature plate. The index arm and mirror supports are brass. Rather than use a sighting telescope, this… …
82Nuclear weapons delivery — Contents 1 Main delivery mechanisms 1.1 Gravity bomb 1.2 Ballistic missile …
83John Birch (luthier) — John Birch was an English luthier mainly known for his electric guitars. Some of his customers included Tony Iommi and Geezer Butler of Black Sabbath, Brian May of Queen, Dave Hill and Jim Lea of Slade, Gerry Shephard of The Glitter Band, and Roy …
84History of laptops — Before laptop/notebook computers were technically feasible, similar ideas had been proposed, most notably Alan Kay s Dynabook concept, developed at Xerox PARC in the early 1970s.The first commercially available portable computer was the Osborne 1 …
85Atari 2600 — infobox CVG system caption = Atari 2600 four switch wood veneer version manufacturer = Atari Inc. type = Video game console generation = Second generation lifespan = vgrelease|NA=October vgy|1977|EU=vgy|1978 discontinue = 1 January… …
86Martello tower — A Martello tower at Clacton on Sea on the east coast of England. Martello towers (or simply Martellos) are small defensive forts built in several countries of the British Empire during the 19th century, from the time of the Napoleonic Wars… …
87Dental implant — Intervention A Straumann brand root form endosseous dental implant placed in the site of the maxillary left permanent first molar with bone graft used to elevate the sinus floor …
88Metayage — Contract for metayage, papyrus, 35th year of Amasis II (533 BC, 26th Dynasty) The Metayage system (Fr. métayage) is the cultivation of land for a proprietor by one who receives a proportion of the produce, as a kind of sharecropping. Cont …
89DoubleSpace — was the original name of the disk compression software that was supplied with MS DOS starting from version 6.0. The purpose of DoubleSpace was to increase the amount of data the user could store on disks, by transparently compressing and… …
90Monster in My Pocket — Not to be confused with Pocket Monsters, the Japanese name for Pokémon. Monster in my Pocket is a media franchise developed by Morrison Entertainment Group, headed by Joe Morrison and John Weems (two former senior executives at Mattel). The focus …
