(control) signal line
21Control-Z — In computing, Control+Z is a control character in ASCII code, also known as the substitute (SUB) character or a keyboard shortcut. Strictly speaking …
22Line array — The term line array means a speaker system that is made up of a varying number of vertically arranged units which give the effect of a single sound source with the same dimensions as the total of the unit of which is made up, the performance of… …
23Control-V — In computing, Control V is a control character in ASCII code, also known as the synchronous idle (SYN) character. It is generated by pressing the V key while holding down the …
24Power line communication — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… …
25Fan control — is the management of the rotational speed of an electric fan. There are many types of electric fans and many types of fan controls. This article principally describes the control of a computer fan, to provide adequate cooling while lowering noise …
26Optical line termination — An optical line termination (OLT), also called an optical line terminal, is a device which serves as the service provider endpoint of a passive optical network. It provides two main functions: to perform conversion between the electrical signals… …
27Kintetsu Utsube Line — Infobox rail line box width = 32em name = Kintetsu Utsube Line image width = 300px caption = Type 260 train at Hinaga Station type = Commuter rail system = status = locale = Yokkaichi, Mie Prefecture start = ja stalink|Kintetsu Yokkaichi end = ja …
28Railway signal — Not to be confused with Railway signalling. A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to train/engine drivers. The driver interprets the signal s… …
29Traffic signal preemption — is a type of system that allows the normal operation of traffic lights to be preempted, often to assist emergency vehicles.[1][2] The most common use of these systems is to manipulate traffic signals in the path of an emergency vehicle, stopping… …
30Automatic Train Control — Japanese style ATC indicator. Automatic Train Control (ATC) is a train protection system for railways, ensuring the safe and smooth operation of trains on ATC enabled lines. Its main advantages include making possible the use of cab signalling… …
