We developed a bit-level concurrent visual programming language A-BITS. Few visual programming languages based on models of bit-level concurrent computation have been developed. Our programming language is useful for developing asynchronous and concurrent programs, which frequently use bit-level operations. Recently, use of such programs has been increasing in fields like video game design, multimedia, and graphical user interfaces.

We also devised a concurrent model of computation called Ajiro Program Circuit (APC), as a base model for A-BITS. It uses processes called primitives, which communicate with each other using vehicles called carriers. In addition, to test the model and prepare for improvement of the system, we developed an APC simulator.