The terms "convertible laptop" and "2-in-1" are often used interchangeably. However, as new types of 2-in-1s have emerged, "convertible" has come to refer mostly to so-called 2-in-1 Attached systems, the original type of laptop-tablet combo in which the keyboard and display remain connected at all times, even as the touch screen flips around or otherwise converts for tablet use. [The other type is the 2-in-1 Detachable, which allows the touch screen portion to be unplugged and used independently as a standalone tablet.]