"First you much purchase additional RAM, after verifying how much RAM your Mac can handle. Next, make sure your computer is turned off, then turn it upside down and take out the screws on the bottom. Once inside, take out the previous RAM and replace with new RAM. Now you must replace the screws and you are finished."
Information about RAM iMac options can be found in the appropriate forum at the Apple website. Information is also available at Mac Sales, Every Mac, MacWorld and DV Warehouse.
You can send the I mac to an apple computer repair center. The prices range from 20 dollars all the way 100 and might be more depending on how old the modle computer is.
No from the factory. You can install one yourself but it is not installed on a new iMac.
iMACs are made without easily-accessible compartments for most components, particularly memory, which means the only way to add RAM is to take the iMAC to an authorized Apple dealer and have them add it. If they have what is needed to make the addition, it is likely to be a pricey one, so get a quote first in case it is less costly to just but a newer, higher RAM version of the iMAC.
Expanding the RAM means adding further RAM to your existing RAM. You could completely install new set of RAM or you can add a similar RAM to the existing one if one slot is empty.
You do not make the iMac, Apple does.
you can not is can only go into one you can not is can only go into one
The original iMac personal computer was the iMac G3. This model was released in 1998 and discontinued in 2003. One can purchase a used iMac G3 on eBay or Amazon.
One can see old iMac Commercials in Youtube which features the different types of commercial about old iMac such as All Mac vs. TV adds, Apple iMac vs. HP, and iMac G3 starting up.
In order to set up a wireless network in one's home, one needs to install a router. If one does not know how to install a router, they can have a professional install it for them.
This is relative to your experience with computers, but RAM is one of the simplest installation tasks that is performed on a computer.
One can install mirrored closet doors in one's home by doing it by oneself or getting someone to come in and install the mirrored closet doors for them.