CPU stands for Central Processing Unit. A Central Processing Unit is the brains of a computer.
RAM stands for Random Access Memory in computers. RAM is needed in order for you to boot up your computer as it loads the data. The more RAM you have the faster it will load and the less your computer will be bogged down, with viruses.
HDD stands for Hard Disk Drive. It is a drive found in computers, some mobile phones, cameras, video game consoles and some camcorders. The drive is used to store data that has been converted into digital format.
NIC is an acronym that stands for Network Interface Card. This is the network card that goes into your computer to allow it to get on the internet.