signal means
61The Institution of Railway Signal Engineers — The Institution of Railway Signal Engineers, known more usually as the IRSE, is an international organisation, active throughout the world. It is the professional body for all those engaged or interested in railway signalling and… …
62time signal — a signal sent electrically or by radio to indicate a precise moment of time as a means of checking or regulating timepieces. [1875 80] * * * …
63distress signal — /dəsˈtrɛs sɪgnəl/ (say duhs tres signuhl) noun a signal by persons in danger summoning aid and indicating their position by rocket, radio code, flag, or any other means …
64gating signal — /ˈgeɪtɪŋ ˌsɪgnəl/ (say gayting .signuhl) noun a signal which controls the passage of other signals by means of an electronic gate …
65time signal — /ˈtaɪm sɪgnəl/ (say tuym signuhl) noun a signal, especially one sent by radio, indicating a precise moment of time and used as a means of regulating clocks, etc …
66Red flag (signal) — Red flag is a semi official term to denote various attention and awareness indicators and signals, both explicit and implicit.The term and the expression to raise the red flag come from various usages of real flags in real life. The semaphore red …
67Data transmission — Data transmission, digital transmission, or digital communications is the physical transfer of data (a digital bit stream) over a point to point or point to multipoint communication channel. Examples of such channels are copper wires, optical… …
68Application of railway signals — Semaphore stop signals protecting the convergence of two tracks into one The application of railway signals on a rail layout is determined by various factors, principally the location of points of potential conflict, as well as the speed and… …
69Hong Kong rainstorm warning signals — The rainstorm warning signals (zh t|t=暴雨警告訊號) are a set of signals used in Hong Kong to alert the public about the occurrence of heavy rain which is likely to bring about major disruptions such as traffic congestion and floods. They also ensure a …
70Graphics tablet — This article is about the computer input device. For other tablet devices, see Tablet device (disambiguation). A graphics tablet (or digitizer, digitizing tablet, graphics pad, drawing tablet) is a computer input device that enables a user to… …
