I've been a user of AutoCAD for 7 years now and I'm certified by AutoDesk (the people who make it).

CAD is a fantastic tool and has so many applications. Primarily I do space planning, which involves taking an area of space, say an office, and fitting in the required amount of staff in there, so many factors have to be considered: health and safety requirements, disability access, electricity, phones, networks etc.

Above all, the space has to be usable by the people in it! Space planning doesn't have to be limited to office spaces, it can be applied to hospitality, exhibitions, or even in your own home!

In the time I've used CAD I've worked on Hospitals, Schools, Local Authority Offices, Conference Centres, and so on.