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Mainframe computer
Is a computer with huge processing power and data storage
Microprocessor
Is the intergrated circuit that is a CPU
Desktop computer
a computer designed to be in one place
Laptop computer
a computer designed to be portable
Pros of laptop
Portability,flexibility and multifunctional
Cons of laptop
Less powerful, short battery life and difficult to upgrade
Mobile phone
Ultra portable , designed to be light weight and fit in pockets
Specialist
designed for specific people
Tablet device
a general purpose device between laptop and smartphone
multifunctional device
a device that carries out a wide variety of tasks
Convergence
Is the merging of technologies that would usually be separate
Features of digital devices
Portability, performance, storage , user interface, connectivity, media support, energy consumption, expansion capability, security features
User interface
Is how the user interacts with the operating systen
Command line
Requires users to interact using text commands
Graphical user interface
Requires users to interact with the os using visual elements such as windows, icons, menus and WIMP
Menu interface
Successive menus presented to a user with a single option at each stage
Natural language
Uses spoken words to respond to spoken or textual inputs from a user
RAM
is the primary storage that is directly connected to the CPU and hold instructions that in use temporarily. Ram is volatile
ROM
Is primary storage that holds the first instructions of computer needs to start. ROM is non volatile
Flash memory
Is a type of electronically erasable programmable read only memory
Application software
Is the software chosen by the user to carry out a specific task
System software
Is essential for the operating of a computer system
Utility software
designed to help maintain, enhance and repair a computer
Defragmentation
Groups of fragmented files back together to increase access speed
Compression
Reduces the amount of secondary storage
Task manager
built in OS allows users to monitor system resources
Operating system
Software that provides an interface between the user and the hardware in a computer system
Single user
Allows single user, no option to customize user interface
Security
Process enabling different users to log onto a computer
Print spooling
carried out by the os when printing is required . This creates a queue
