Момент удара ракеты по спутниковой станции в Израиле попал на видео20:56
SelectWhat's included
，详情可参考新收录的资料
Lots of functionality that indicate a long history. ⎕OFF exits the program, seems like back then it would turn off the machine APL runs on. There's a system function ⎕ML to switch some APL primitives to do what they would do in a different APL implementation. And of course, setting the index origin to 1 or 0 with ⎕IO.
Pull-Based Reactivity