And now a rather special part, which camera-device to use for a permanent station to handle your work-photos. Means, items you are about to sell, sheets telling when you sent the package out to which address, taxes, incoming invoices etc.. All the stuff, you would erase in a few days or keep in folders like "January invoices" or "January mail_in" etc..
In all these cases, you will want a solution, which is affordable, reliable and permanent without eating up all the space on your desk. Later, you will want this not to be too obvious. Here is my solution:
Step 1: Digital camera, Canon Powershot series.
Step 2: They deliver a software called "Remote Control", this helps to run and control and fire off the camera from your keyboard - including a life view.
Step 3: Make yourself aware, which operating system you are using, since the older ones only run with XP, the later ones with Windows 7 and 8. To find out about this, there is a brilliant site:
http://www.breezesys.com/PSRemote/index.htm
This guy produces an alternative to PSRemote, which comes along with the Canon. It has a few extras, but it kicks when it comes to the batch and api mode!
Depending on the money you are ready to spend, DSLRs can do even more fancy things - controlwise.
From experience, I advise everyone to look for a camera, which offers a power supply and to use a single tripod leg (not a small desktop tripod). The single tripod leg offers telescoping, you can pull your camera out or push it in. It hardly takes any place and inside any daylight office it takes very reasonable pictures - good enough for OCR.
This is an old picture, but it shows what is important, I believe.
http://www.zeitenwanderer.de/images/sin ... tripod.jpg