All tasks must be entered into the computer in one language, that he "understands", That means, after which he can carry out the electronic processing. The binary number system is best suited as a computer language, which is a two digit system, So just the digits 0 and 1 contains. Binary numbers are also called binary numbers (Latin: duo = 2). The two characters can be represented in different ways, either by perforation or non-perforation at certain points in the paper strip or by two distinguishable electrical voltage values. With the binary signs are not only numbers, but also formed letters and words. Binary numbers can also be represented by series of lamps: Any lamp, which receives no electricity and remains dark, means 0, each lightbulb that is on means 1.
The binary number, that this lamp series represents, looks like this when written: 011000101001. Converted to a number of tens it gives: 1577. Do the math.