Computer knowledge

Being able to instal two of the same programs. On the PC and on the mobile phone, smartphone. So it's possible to manage two accounts fast. -For example: One private account and one business account. - Maybe it's possible to instal two of the same programs on the PC by using two hard disks.

A program which will make 1 text file from many text files. Maybe with some options and settings. -Like the option for a seperation line between text files. - So selecting for example 10 text files. And then the program will put them into order and save it as one text file. - Important: It should be able to input multiple to all text file extensions.