a control system in which an input alters the output, but the output has no feedback loop and therefore no effect on the input.
- Open look
operating system A graphical user interface and window manager from Sun and AT&T. Usenet newsgroup: news:comp.graphics.openlook. (1995-06-11)
[oh-puh n-lahyn] /ˈoʊ pənˌlaɪn/ adjective 1. (of a radio or TV show) maintaining open telephone lines to permit listeners or viewers to phone a program with comments, questions, requests, etc.; call-in. noun 1. (Canadian) a radio or television programme in which listeners’ or viewers’ questions, comments, etc, are telephoned to the studio and broadcast live. […]
noun 1. a letter, often of protest or criticism, addressed to a specific person, but intended to be brought to public attention. noun 1. a letter, esp one of protest, addressed to a person but also made public, as through the press
[op-uh-rat-ik] /ˌɒp əˈræt ɪk/ adjective 1. of or relating to : operatic music. 2. resembling or suitable for : a voice of operatic caliber. noun 3. Usually, operatics. (used with a singular or plural verb) /ˌɒpəˈrætɪk/ adjective 1. of or relating to opera 2. histrionic or exaggerated adj. 1749, from opera on model of dramatic.