monitor in front of a person. The laptop usage in the bed, in the garden, on the train and in other possible and impossible places is not covered here. Arm positions on the table The first rule computer users, especially at home, usually skip is that the arms should be relaxed when typing on the keyboard or working with the mouse. That is because if they are always strained, a person gets tired very quickly and in no position to use the computer for a long time. To have arms relaxed, they should lie on the table, as simple as that. The table height should be sufficient for that and the most important thing is that the table depth should also be sufficient. It needs to accommodate a monitor, a keyboard, a mouse and computer user's arms. If necessary (and it is necessary most of the times) a piece of paper or a notebook could lie between a user and a keyboard on the table in order for a user to make some written notes. Many home computer tables are very narrow and have a special shelf for a keyboard, which is extended from below the main table's surface, which a monitor usually stands on. Arms in this case are just going to hover in the air when using keyboard or mouse -- so it's a huge mistake to buy this sort of tables. You would save a space in the room where a table is to be placed but