.BAT

.BAT files are batch files that can include one or more MSX-DOS internal or external commands. These are standard ASCII files.

.BTM

.BTM files are batch files that can include one or more MSX-DOS internal or external commands as well as more complex scripting commands such as GOTO and GOSUB commands. BTM-files are supported by MSX-DOS versions 2.40 or later. These are standard ASCII files.

.COM

.COM file extension is used by machine language programs. This file does not have any header. COM-files are always loaded to address #100