The software environment for programming the Tower is a Java interface with tabs for each major function. A sample window is shown below. There are currently two foundations for the Tower, and since each has a different primitive set, different compilers are needed. The PIC Assembly and PIC Prog tabs are used for programming assembly code, versus compiled LOGO code. The assembly can either be programmed directly through a low-level pic programmer, or by a serial-line boot loader. The Graph tab provides standard visual output and graphing functions useful for scientific applications. It is important to note that while this interface uses LOGO as its predominant user-level programming language, it is possible to write libraries for other compiled languages such as Java and C++ that directly interface to the Tower's hardware platform.