Online / offline, Whether a device is or isn’t connected to the Internet, Security update, Applying patches and new versions of software so that it works well, Maintenance, A fix for software which prevents hackers from attacking a system, Data security, Keeping information protected from hackers or being leaked, Virtual machine, Emulating hardware so that one computer can appear to have many ‘computers’ running inside it, Notification, A message that tells a user that an event has happened, or an action needs to be taken, Installation, Copying software to a computer for the first time and applying initial settings, Responsiveness, The speed in which a system does something after a user has requested it to, Performance, How many tasks a computer system can carry out at once.

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