Photo elaborate on the history of computer memory · apple iPhone 4 ...

Figure 3: Hollerith punch cards card reader (left) and general polygraph (right). Perforated paper tape. And punch cards, just as the mechanization of the textile industry, weaving the first to use punched paper tape. On the computer, punch paper tape ... It is the traditional hard drive (HDD) is different, HDD is a mechanical and electrical equipment, including rotating disks and removable read-write heads. On the contrary, SSD use micro-chip, and no moving parts can be. ...