Computer science

​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.

​Repeating same password for email, social media accounts, and work account could be dangerous, because hacking one of the accounts can expose other accounts too. Passwords for such accounts must be unique.

​BOD or bring your own device to work had eased employees work with computing equipment, however at the same time it had increased chances of malicious activity. Home computers may not have same strict level of information security as a company may have, and computing equipment may get infected with malware at home, therefore when it is connected to work network may represent a danger.