how can i connectt a servo directly with a computer

[ballbreaker]

not to remember the command just to execute it like calibrating it to go to 0 do i need a microcontroler  or is there another way.

[amando96]

You can use a parallel port if you have one.

[Razor Concepts]

Basically the only way to do it directly is with the parallel port as armando said. However, it isn't the easiest thing to do.

Alternatively you could get a USB servo controller:
http://www.lynxmotion.com/Product.aspx?productID=395

[ballbreaker]

which of the parallels port pins i use?

[Soeren]

One of the data pins would be the obvious choice, as they are outputs.
But controlling it from Windows will be tough, as you only work with a "Virtual Machine" i.e. timing will be off, so better use DOS or Linux.