What are the three text files used to configure DOS for backwards compatibility?

Answer:
There are many files which you can edit as a text file.. IO.SYS, MSDOS.SYS, CONFIG.SYS, AUTOEXEC.BAT and many more..
First answer by Nilabhverma. Last edit by Nilabhverma. Contributor trust: 40 [recommend contributor recommended]. Question popularity: 1 [recommend question].