DOS操作系统下运行的一个简易编程软件，相比其他软件来说更简单易学，有作图，演奏，计算运算等多种功能-Running under the DOS operating system, a simple programming software, compared to other software is more easy to learn, there are mapping, playing a variety of functions such as calculation operator

Matlab三维箭头标识图，可能比较简单，但是非常实用，作图时可利用-Matlab three-dimensional arrow logo map, may be more simple, but very useful, can be used when mapping