5. Flash memory
- Solid-state (No mechanical parts, electronic circuit read and write) non-volatile memory devices.
- Hardrives and other peripherals may contain flash chips, they are useful for storing information like BIOS(Basic Input and output system) that is needed for a computer to boot up.
- BIOS chip is fixed to the motherboard but can be rewritten.
- Flash memory is read much faster than it's written
- It's reliable for up to 100 000 erase cycle after it becomes unreliable.
- The combination of durability, speed, price, and capacity makes flash memory an ideal storage medium.
6. Flash USB drives
- plug and play- which means it can be used as soon as its plugged in. No drivers needed.
- Contains flash memory, USB port and a controller which controls the read and writing of the chip.
- The efficiency of the control determines the speed at which the device can operate.
7. Memory cards
- Form of flash memory
- Commonly found in portable devices such as mobile phones and cameras.
- Can have a capacity anywhere from 4Gb to over 2TB.
8. Solid-state drives
- Form of flash memory
- Has no mechanical parts.
- Commonly found in laptops and computers.
- data can be directly accessed because it's a digital form.
Input Devices:
1. Keyboard:
- The keyboard is used to mechanically input data via numbers, alphabet chars and symbols.
- Can also be used for navigation.
- Most keyboards use the 'QWERTY' design. This design was made to limit the speed to unsure no key jams occurred.
Type of keys found on the keyboard:
- Control Keys - These a modifier keys which are used in conjunction with other keys for specific tasks
- Navigation keys - These keys are used to navigate through documents, computer and internet pages.
- Alphanumeric keys - used to type numeric and alphabetic inputs.
- Numeric-pad keys - Used for navigation and also Calculations. To switch function, use the num- lock key.
- Function keys - Found on top of the keyboard. used to do specific tasks based on OS. They can also be used in conjunction with other keys.
- Indicator lights - Indicator lights show if your keyboard has Caps Lock, Num Lock or Scroll Lock on.
2. Mouse:
- A mouse is used for navigation
- There are different pointers for different tasks
- traditional mouse has two buttons. The modern mouse has an added accessory called the scroll wheel. A mouse can be modified for different uses, like the gaming mouse with more buttons.
- The primary button is on the left and is the most used. It is used for clicking on parts of the graphical interface.
- The secondary button is found on the right and is used to open context menus.
Mouse actions:
