Lots of stuff; RAM, ROM, hard drive, CPU. All these and more work together in carrying out a computers functions. The CPU is the converter and the other things store the memory and instructions from the computer.
The Indian Ocean does not touch the continent of North America. The Southern Ocean (the fifth ocean), which is sometimes considered by many to be an extension of the Pacific, Atlantic and Indian oceans and surrounds Antarctica, also does not touch the continent of North America.