Laptop computers should never be used on your lap, especially if the computer is wireless. If you are pregnant, the fetus can be exposed to wireless radiation at levels shown to be harmful in scientific research. Children should never use a laptop computer if it is functioning on its wireless mode. There are clear associations between the use of wireless technology and childhood autism. Safe use of a laptop would include placing the computer on a flat surface as far as practically possible from the user, having it connected to the internet by a cable, and using a wired mouse.