MS-DOS Mobile goes back to the basics. The user type commands to the prompt to access files and folders. The main apps are located in C:\PROGRAMS\PHONE. You can access that by typing these commands:
cd programs
cd phone
dir
This lists all the available apps. For example, typing camera.exe in the next line launches the camera. The camera has three modes: ASCII, B&W, and CGA. You can also switch between the front and rear camera.
There are several other programs that you can check out:
Contacts - Opens the contacts list.
Email [address] - After user types a message and presses the done button in the application bar, the platform's email composer is launched
Maps [search terms] - Launches the map app with search terms
Market - Launches Windows Phone Store
Phone [number] - Launches phone app with given number
Review - Launches review page for this app
Cortana [search terms] - Launches Cortana with the search terms
SMS [number] - Launches SMS composer with the number