I have a Imac G4 running Os X 10.3.9 on 384 Mb and 700 MHz processor, What can i update on my computer?
-Ram, Mhz, exc??
Please this would be loads of help.
-Ram, Mhz, exc??
Please this would be loads of help.

The maximum ram you can put in it is 1 Gb. 512 Mb in the User slot and 512 in the Service slot. You can run Leopard on it with a little bit of tweaking, but I would recommend Tiger. It can't run faster the 700Mhz. If you do open the iMac to replace the Service ram stick please read up on hold to do it first and make sure you get the right kind of ram. The two ram sticks in a G4 iMac are different in type.
It is long or not so long. Can you tell me what text is on it. Allthe text please.
That's the wrong RAM for an iMac G4. That's a PC100 stick. (Product page here) and the iMac needs PC133.
The stick you have will physically fit, but it's the wrong speed for your iMac.
My guess is that you currently have 256mb in the user replaceable slot, and 128mb in the non-user accessible slot, for a total of 384mb. Even if you add 512mb in the user replaceable slot, you will only get 512+128=640mb of RAM. You would have to add 512mb to both slots to get the full 1gb, but one of them has to be done by a service tech.
Can you please send me a link to the user accessible one?
last time i bought one for my ibook g4 it fried my computer.