4. Has a rigid cell wall made of peptidoglycan (except for the mycoplasma). This cell wall is thick in Gram-positive bacteria and thin in Gram-negative bacteria. It is the thickness of the peptidoglycan that accounts for the ability/lack of ability to retain the crystal violet used in the Gram stain.
Computer hardware is the physical parts or components of a computer, such as the monitor, mouse, keyboard, computer data storage, hard disk drive (HDD), graphic cards, sound cards, memory, motherboard, and so on, all of which are physical objects that are tangible.
Computer Components: Computers are made of the following basic components: 1  Case with hardware inside: 2  Power Supply-The power supply comes with the case, but this component is mentioned separately since there are various types of power supplies. 3  The one you should get depends on the requirements of your system.omputers are made of the following basic components: 1  Case with hardware inside: 2  Power Supply-The power supply comes with the case, but this component is mentioned separately since there are various types of power supplies.