Computer science

​At the back of your computer you will find many connections that are part of that computer’s motherboard. You can find multiple USB connections, a connection for a monitor, if your motherboard supports video functionality,  Older computers may have PS/2 connections for a keyboard and a computer mouse. These had been replaced with USB keyboard and a computer mouse. These can also be wireless using Bluetooth technology. Network Ethernet port can be a part of a computer motherboard, and Ethernet connection can be found at the back of a computer. However dedicated network cards can provide better functionality. Dedicated network cards are usually found in the server systems, desktop systems generally will not require a dedicated network card. Wired network connectivity had been replaced in many homes with WiFi, therefore a need for physical cable is limited. Audio connections can also be found at the back of a computer. Number of connections will depend on what type of sound is suppor...

​Optical drives also can be found at the front of a computer case. This is considered an older technology, so new computers may not have these installed. These had been replaced with flash drives and external disks. CD and DVD media can be used with such drives. Please note that majority of DVD readers will be capable of reading CD media.

​At the front of a computer case you can find several jacks to connect audio equipment. There can be headphones jack and a microphone jack. Additionally there could be one or several USB ports to plug in USB devices that you have. It is big convenience to have them at the front of a computer, otherwise a person needs to reach out to the back of one to use such ports. Some older systems may have FireWire port at the front too.

Computer system cases can be different sizes. There can be small, medium and large system cases. There could be also all-in-one computer unit. Regular computers can be upgraded, or enhanced with additional functionality. However all-in-one computer has limited upgrade ability. You can replace memory, or install a bigger long-term storage disk there, but this is about all of the enhancements you can do with such a system. Adding hardware to a regular system unit is much easier than adding hardware to all-in-one system unit. Number of devices will depend on availability of expansion slots and power support by the power supply unit.

​There are three things that an operating system needs to do: 1. Manage hardware access. 2. Provide user interface. 3. Manage files and applications. Managing hardware is either built-in into an operating system. For example an operating system knows how to operate long term storage disks. If an operating system doesn’t know how to operate a device, than it is responsibility of that device manufacturer to provide drivers for that hardware, so an operating system knows how to use it. For example video cards may be used by the operating system using a generic video cards may driver, but to use this video card at full capacity, a driver from this card manufacturer is needed. Some devices use “plug-and-play” model. Generic drivers of how to use such hardware is available with the operating system, however to use full functionality of such hardware, the device driver from the manufacturer maybe needed.

​Data analysis is a process of reviewing and understanding data, based on that analysis conclusions can be made.