A desk can be used for putting your computer on. A desk can be a place for doing homework/work. A desk can be a place for writing.
Because Lyndon Johnson was to big for the Resolute Desk, so he decided to use his own Desk, The Johnson Desk.
Credenza is the desk behind the desk. Typical use is for a computer or used in a u-shaped desk.
The use for a teacher's desk is to hold papers, paperclips, markers ect. Think of it this way, if a student has a desk, why shouldn't a teacher?
Woodrow Wilson's desk
Any office desk can be used as a table. It depends what you wish to use the table for. If you wish to use it formally then a wooden desk would be your best bet.
roll top desk is to be functional enough to use as a computer desk.It has space enough to house all the components of a desktop computer.
I would use a tape measure.
It depends on the width of the desk. You could use centimeters or meters.
"Teacher's desk" in English means cattedra in Italian.
Some of the desk accessories that are available at Overstock.com is Organizers for personal use, Desk Pad, and there is a wide varity of wastebaskets that would be useful.
There is usually a mini filing system you can buy in stores that either sit on top of your desk or can be place on the floor besides your desk.
If you spend many hours on the phone at a help desk, use a headset instead of a regular phone