Computer Systems can be defined as a collection of hardware components that work well together with software components or programs that run on the computer. Computer Systems obtain data as the input and process this data to provide us with the output, for example, a command or information. A Computer System will only follow the instructions that the user inputs. A few examples of computer systems that we use today, are, mobile phones, keyboards, touchscreens, barcode scanners, touchpad etc. Computer Systems that we come across in everyday life are library systems, emails, holiday bookings, shop tills and the internet. (Patrick Hayes 2017) cites that a Computer System is made up of four parts; Input, Process, Output, Backing Storage.
Griffith
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This data has been transformed into useful information that we can use and see. This information would usually be displayed on a monitor or paper printout, and is easy for us to understand. Examples of output devices are laser printers, touchscreens, speakers, and mobile phones.
Information and Communications Technology (ICT), refers to technologies that provide access to information through telecommunications. This includes mobile phones, the internet, wireless networks and emails. Paul Bocij, Andrew Greasley and Simon Hickie (2000) clearly identify a “Business Information System to be a group of interrelated components that work collectively to carry out input, processing, output, storage and control actions in order to convert data into information products that can be used to support forecasting, planning, control, decision making, and operational activities in an
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E-mailing is a good example of why organisations initiate Information Systems. An Information System can be defined as an organised system for the collection, organisation, storage, and communication of information. Emailing allows for messages to be sent and received through computers by business organisations and for personal use. It is the most common form of electronic communication apart from texting. Emails are text-based but you are able to upload and send other types of files (PDF, DOC) as attachments. Emailing is very practical for business organisations as it is very cheap (sometimes free i.e. Gmail), immediacy, it keeps record of all said conversations, for example all messages will remain in a user's inbox (if not deleted) which is far more efficient than keeping printed documents in a filing drawer, and for marketing. Emails allow for organisations to effectively spread information about their services and/or products to new and existing customers. For example, a shoe company could set-up an email list to which any user can subscribe, and then the company can send weekly updates to everyone on the email list detailing new additions to their shoe