A driver is a specially written program which understands the operation of the device it interfaces to, such as a printer, video card, sound card or CD ROM drive. It translates commands from the operating system or user into commands understood by the the component computer part it interfaces with.
The Mental Age Test consists of 20 statements. Answers are multiple choice. Your first answer is your final answer. Statements are selected at random. 9,332,812 people have now taken this test. Nobody will see your answers - so be honest !
Answer Wiki. According to wikipedia article Old age the ages of 62-79 is considered old age and then advanced age. The body starts to loose efficiency much earlier than that time (less than 40). This may be linked to physical age, but mentally you never need to feel old.