Computer Hardrive

optical drive

Optical drives retrieve and/or store data on optical discs like CDs, DVDs, and BDs (Blu-ray discs) which hold much more information than classic portable media options like the floppy disk.


A computer monitor is an essential part of the machine. A computer monitor displays the output from the hard drive, video card and CDROM. Without a monitor, a computer is not operational. There are several types of monitors similar to a regular television. Flat-screen monitors with enhanced technology make it easier for users to install the device onto their computer. These monitors have replaced old tube screens that take up more space and are harder to install.


Small CPU size depends on the number of transistors that can physically be crammed inside. Learn more about how to make a small CPU. These days, the number of transistors doubles every 24 months. But that raises an interesting question: How small can transistors  and by extension.

Hard drive

Introduced by IBM in 1956, HDDs became the dominant  device for  by the early 1960s. Continuously improved, HDDs have maintained this position into the modern era of service and pcs. More than 200 companies have produced HDD units, though most current units are manufactured by Western Digital, Seagate, and Toshiba. Worldwide revenues for HDDs shipments are expected to reach $38 billion in 2012, up about 19% from $32 billion in 2011.