Jobs in the Information Technology industry are almost always professional positions. One aspect which makes IT a profession is that it has its own body of knowledge and terminology to go with it. Most people have only a rudimentary 'computerese' vocabulary. The thing that they look at when they use a computer is called a monitor or just 'the screen'; the little arrow on the screen is called the cursor, and the thing they type with is called a keyboard. Few users know (or care) what a 'file format' is and fewer still do not know what an 'invalid sector' on a floppy disk might be.

Good programs use language appropriate for the audience. The problem is that quite a lot of software intended for the general desktop user reads like Yiddish for Joe User. In such cases, regular, everyday language should be used as much as is possible. For file management software, 'volumes' are really disks -- even though the term isn't quite accurate, a normal person thinks a disk is a storage container and that volume is what you have up too high at really good parties. Images are 'pictures'. A person doesn't 'kill' a application that has 'hung' -- he 'forces a frozen program to quit'. Details like this may seem minor, but many small improvements in a program's usability can have a profound effect overall. Of course, if your target audience is IT professionals, these kinds of terms are perfectly acceptable. Be sure that you match the everyday language of your audience and when in doubt, err toward using less technical language.