But they come with their own little USB adapters. Lol. dont trust any computer without bluetooth built-in from default, this is like asking if you want a notebook without wi-fi. Bluettoh mouses have the advantage that they dont use 1 USB port, as bluetooth is a hidden antena within the notebook.
Definition of arkose. : a sandstone characterized by feldspar fragments that is derived from granite or gneiss which has disintegrated rapidly.
angle of repose. noun, Geology. 1. the maximum slope, measured in degrees from the horizontal, at which loose solid material will remain in place without sliding. Compare angle of slide. angle of repose.