four-row keyboard
41Oval spinet — The oval spinet is a type of harpsichord invented in the late 17th century by Bartolomeo Cristofori, the Italian instrument maker who later achieved fame for inventing the piano. The oval spinet was unusual for its shape, the arrangement of its… …
42fugue — fuguelike, adj. /fyoohg/, n. 1. Music. a polyphonic composition based upon one, two, or more themes, which are enunciated by several voices or parts in turn, subjected to contrapuntal treatment, and gradually built up into a complex form having… …
43Flutina — Infobox Instrument name=Flutina classification=Free reed aerophone range= related= musicians= builders= articles=The flutina is an early precursor to the diatonic button accordion, having one or two rows of treble buttons, which are configured to …
44information processing — Acquisition, recording, organization, retrieval, display, and dissemination of information. Today the term usually refers to computer based operations. Information processing consists of locating and capturing information, using software to… …
45Mac Mini — 2011 Unibody Mac Mini Manufacturer Apple Inc. Release date July 20, 2011 (current release) January 22, 2005 (original release) Introductory price US$599 …
46Commodore 128 — Release date 1985 Discontinued 1989 Operating system Commodore BASIC 7.0 Digital Research CP/M 3.0 …
47concerto — /keuhn cher toh/; It. /kawn cherdd taw/, n., pl. concertos, concerti / tee/. Music. a composition for one or more principal instruments, with orchestral accompaniment, now usually in symphonic form. [1720 30; < It, deriv. of concertare; see… …
48cryptology — cryptologist, n. cryptologic /krip tl oj ik/, cryptological, adj. /krip tol euh jee/, n. 1. cryptography. 2. the science and study of cryptanalysis and cryptography. [1635 45; < NL cryptologia. See CRYPTO , LOGY] * * * Introduction …
49South Asian arts — Literary, performing, and visual arts of India, Pakistan, Bangladesh, and Sri Lanka. Myths of the popular gods, Vishnu and Shiva, in the Puranas (ancient tales) and the Mahabharata and Ramayana epics, supply material for representational and… …
50Enigma machine — Military Enigma machine …
