All lines of MacBook, MacBook Air and MacBook Pro portable computers.
MacBooks are Mac laptops with Intel processors, divided into different lines introduced at different times.
First came the MacBook Pro line, on January 10, 2006, with a recent addition of Retina displays to some of the line.
Then came the MacBook line which was primarily made out of polycarbonate, though one model was an aluminum unibody. Polycarbonate MacBooks were introduced in May 2006.
Next the ultra-portable Macbook Air line was introduced in January 2008.
The most recent addition to the MacBook line is the Retina MacBook, which became available for sale in April 2015.