Apple's brand for their computers, which run MacOS. Apple give names to their operating systems, such as Mavericks, Leopard, Lion etc.
Term given to software infected with viruses that aim to sell you products, often fake antivirus products.
Measured in 1000's for disc storage and 1024's for RAM. 1 Megabyte (MB) equals 1024 Kilobytes (KB). 1KB is 1024 bytes. 1 byte is one character or binary digit.