JSS1 - SS3 Lesson Notes
Lesson Notes, Audio Lessons, Exam Questions
Lesson Notes, Audio Lessons, Exam Questions
Access well-structured and comprehensive notes for JSS 1 Computer Studies covering the 1st, 2nd, and 3rd terms.
These notes are aligned with the Nigerian educational curriculum and are designed to help students better understand key computer science concepts and excel in exams.
See our JSS 1 Computer Studies notes for 1st, 2nd, and 3rd terms. Comprehensive notes for the Nigerian curriculum, perfect for exam preparation.
The Importance of the Computer as a Tool for Data Processing The computer is a very unique electronic device and has certain features and characteristics that distinguish it from other machines. These include: Speed: Computers are very fast; they can…
Definition of Data Processing Data processing is the process of producing meaningful information by collecting all items of data together and performing operations on them to extract information. Data processing can also be described as a series of actions or…
Generations of Computers Generation of computers is the developmental stages that the computer has gone through. There are 5 generations of computers and their accompanying innovations. First Generation – Vacuum Tubes (1940 – 1956) First generation computers were those manufactured between…
JOHN VON NEUMANN’S MACHINE In 1945, mathematician John von Neumann undertook a study of computation that demonstrated that a computer could have a simple, fixed structure, yet be able to execute any kind of computation given properly programmed control without…
Electro-mechanical Counting Devices JOSEPH JACQUARD’S LOOM The Jacquard machine is a device fitted to a power loom that simplifies the process of manufacturing textiles with such complex patterns as brocade, damask and matelassé. It was invented by Joseph Marie Jacquard…
Electro-mechanical Counting Devices These are counting devices that could be operated both electrically and mechanically. Electro-mechanical devices include the following: Speeding Clock Blaise Pascal machine Gottfried Leibniz Machine SPEEDING CLOCK OR CALCULATING CLOCK In 1623 and 1624, reported his…
Mechanical Counting and Calculating Devices As a result of the disadvantages of the early counting devices, more advanced mechanical counting and calculating devices were invented. Some of these devices are; Abacus (Chinese) Napier’s Bone (John Napier) Slide Rule (William Oughtred)…
HISTORICAL DEVELOPMENT OF COMPUTERS: EARLY COUNTING DEVICES Definition and Examples of Early Counting Devices Early counting devices are devices that were used in the early days to perform arithmetic operations such as addition of numbers, subtraction and multiplication. These devices were used for the usual barter trade…
MODERN METHODS OF TRANSMITTING INFORMATION With modern inventions in communication, many ancient methods have been replaced with more efficient modern ways of transmitting information. These include the following: Printing Telephone Global Systems for Mobile communication (GSM) Telex Radio Television Facsimile…
Oral method This is one of the oldest methods of transmitting information. It is the era of our great grandfathers when information was sent to people only through the use of the mouth. Drum beating Beating the drums was a…
Definition of Information This is data already processed into a meaningful form for decision making. Information conveys meaning and is useful to one or more people. Definition of Transmission This is the process of transferring something from one location to…
Users are a key component in any information system. Therefore, protecting users is just as important as protecting hardware, software and data. The widespread use of computers have led to some important health concerns which are; Repetitive Strain Injury (RSI)…
Many of us go through our daily routine without noticing how many times we come into contact with computers. Computer technology has become such a part of our daily lives that if it were taken away we would lead radically…
Meaning of ICT ICT is an acronym which stands for Information and Communication Technology. It can be described as a diverse set of technological tools and resources used to communicate and to create, disseminate, store and manage information. These technologies…
Rules and Regulations of the Computer Laboratory The following are the rules and regulations of the computer laboratory: Computer room should be kept tidy always by regular cleaning Do not remove or load any software into the computer The security…
Definition of Computer Room Computer room is a room specially created for keeping computers and other peripheral devices. It is also called computer laboratory. In designing this room, the components of a computer room must be put into consideration. Components…
A computer is an electronic device that can accept data and process data in order to get the required information. The computer receives data through the input device, and it processes the data to generate 1information which it produces and…
THE KEYBOARD AND TYPES OF KEYBOARD CONTROL KEYS:they are used in line with other keys to instruct the computer to perform specific tasks. They are ctrl, del Esc and Alt. CURSOR- CONTROL KEYS: otherwise known as curdor manipulations keys allow…
Definition of the Keyboard The keyboard is an input device that is used to send data into the computer. Its cable must be connected to a port of the system unit before it can operate. It is similar to an…
TYPES OF MICRO COMPUTER Micro computer is the smallest and the cheapest class of computers built for special purposes, e.g. for use in clocks, cameras etc. Micro computer contains between ten thousand and two million bytes of internal memory locations,…