Roller Blinds is one where the blinds material (generally a stiff material) is rolled onto a roller, which is generally made from Aluminium. This roller sits at the top of the window and can be lowered as you wish. You can either lower the roller fully so as to cover the window, or you can lower it partially.
Translucent fabrics allow light yet give complete privacy whilst blockout fabrics bring darkness. Screen fabrics allow view yet give privacy and canvas fabrics stop the heat. By walking through your house office you can ascertain what type of blinds suits each office room/window.