M. Guymon Pleasant Grove High School Spring 2003 Operating Systems Computer Technology Day 3

Pleasant Grove High School Spring 2003 M. Guymon Development of computers

Pleasant Grove High School Spring 2003 M. Guymon 1 st Generation computers  Used vacuum tubes. Vacuum tubes are electronic devices that control the flow of electrons.  Had no operating systems. Used custom application programs, which were made for the specific task that the computer was to perform.  Instructions were necessary for every aspect of the computing job.

Pleasant Grove High School Spring 2003 M. Guymon 2 nd Generation computers Used transistors.  Transistors performed functions similar to vacuum tubes, but they were smaller, cheaper, less power-hungry, and more reliable. Ran programming language compilers.  Used English like commands rather than binary numbers.  Made it possible to develop software.

Pleasant Grove High School Spring 2003 M. Guymon 3 rd Generation computers Used integrated circuits. Minicomputers were introduced.  Smaller and less powerful than 1 st and 2 nd generation computers, but had the ability to run multiple programs for multiple users simultaneously.

Pleasant Grove High School Spring 2003 M. Guymon 4 th Generation computers Used general-purpose microprocessors.  Computer systems were smaller, faster, and less expensive than 3 rd generation computers.

Pleasant Grove High School Spring 2003 M. Guymon Operating System Software Master controller for all activities that take place within a computer; primary purpose is to help the computer system monitor itself in order to function efficiently. Interacts with application software, device drivers, and hardware to manage a computer’s resources. Ensures that input and output proceed in an orderly manner.

Pleasant Grove High School Spring 2003 M. Guymon Platform Underlying hardware and software of the computer system. Two popular platforms  PC  Mac

Pleasant Grove High School Spring 2003 M. Guymon Multitasking Running more than one program at a time. Making sure that the instructions and data from one area of memory don’t interfere with memory allocated for other programs.

Pleasant Grove High School Spring 2003 M. Guymon GUI (Graphical User Interface) A type of user interface that features on- screen objects, such as menus and icons, manipulated by a mouse. Abbreviation is pronounced “gooey”.

Pleasant Grove High School Spring 2003 M. Guymon Definitions Program  Set of detailed, step-by-step instructions that tell a computer how to solve a problem or carry out a task. Application Software  Set of computer programs that help a person carry out a task.

Pleasant Grove High School Spring 2003 M. Guymon Basic definitions Drive  A location on a network that is set aside for the collection of data. Folder  The subdirectory or subdivision, of a drive that can contain files or other folders. File  A named collection of data that exists on a storage medium.

Pleasant Grove High School Spring 2003 M. Guymon Resources Parsons, June Jamrich, and Dan Oja. Computer Concepts. Boston: Course Technology - Thompson Learning, 2002.