Semaphore
Semaphore
Speed of light
<i><b>Semaphore</b></i> can refer to:<ul><li> <b><a href="Semaphore (communication)">Semaphore communication</a></b> by means of flags or other positional indicators. <li> A mechanical device (a semaphore signal) used in <b><a href="Railway signal">Railway signal</a>ling</b> <li> <b><a href="Semaphore (programming)">Semaphores</a></b> in computer science, in which only one part of a concurrent system may access a limited resource. This application of <a href="Mutual exclusion">Mutual exclusion</a> in computing was invented by <a href="Edsger Dijkstra">Edsger Dijkstra</a>. <li> <b>Semaphore, South Australia</b>, an historic seaside community in southern Australia. <li> <b>Semaphore</b> is a comprehensive integrating accounting software systems. </ul>