By default, the windows desktop display the following icons/programs
1. Your Recycle Bin
2. My Computer
3. The Internet Explorer
4. The default Windows Background
5. Your windows menu
6. My Documents
7. Your task bar
8. Time (located at bottom right)
Computer Categories are like
Supercomputers, mainframe computers, microcomputers, mobile computers, minicomputers.
I hope that this is the type of answer that you were looking for.
Internal combustion is the answer
