Welcome great EduPodian, here is your Third Term JSS1 Computer Science Lesson Note excerpt.
Scheme of Work
1. REVISION/DEFINITION OF COMPUTER PROCESSING
2. IMPORTANCE OF COMPUTER AS A DATA PROCESSING TOOL.
3. THE DEVICE
4. TYPES OF COMPUTER
5. USES AND APPLICATION OF COMPUTER
6. ADVANTAGES AND DISADVANTAGES OF COMPUTER
7. MASTERY OF THE KEYBOARD I
8. MASTERY OF THE KEYBOARD II
9. SCREEN POINTING DEVICES
10. FUNDAMENTAL COMPUTER OPERATION
Week 1:
TOPIC: DEFINITION OF COMPUTER PROCESSING
COMPUTER PROCESSING
Computer processing is an action or series of actions that a microprocessor, also known as a central processing unit (CPU), in a computer performs when it receives information. The CPU is a type of electronic “brain” for a computer system, and it executes a series of instructions that are fed to it by software programs installed onto a computer’s hard drive and loaded into random access memory (RAM). Though modern computer systems have become much faster and more complex than their earlier counterparts, they still perform the same basic type of computer processing.
There are four distinct states that processing goes through in order to produce meaningful output for any program. These states are commonly referred to as (fetch, decode, execute and write back).
A computer has four main components: the central processing unit or CPU, the primary memory, input units and output units. A system bus connects all the four components, passing and relaying information among them.
Central Processing Unit (CPU)
Computer scientists typically call the CPU the “brain” of the computer because this is where programs are executed. The CPU is further broken up into… Click here to order the complete Computer Science Lesson Note for JSS1 third term
Week 2:
TOPIC: IMPORTANCE OF COMPUTER AS A TOOL FOR PROCESSING DATA
DATA PROCESSING TECHNIQUES
There are different basic techniques of data processing namely:
Batch Processing
Real Time Processing
Time Sharing Processing
Demand Processing
Multi Processing
BATCH PROCESSING
It is a technique by which a number of jobs (data) are inputed into the computer system at the same time and the computer is made to execute those jobs, one after the other in sequence, at its own pace. This type of processing is suitable for accounting and business applications such as payroll accounts, invoicing, purchases, sales, ledger etc.
REAL TIME PROCESSING
In Real-Time Processing data are processed immediately, now. It is processed in rapid manner so that the results of the processing are available in time to influence the current activity or process being monitored or controlled. It is useful in transaction application where time is a critical factor e.g. airline reservations, banks etc.
TIME SHARING
In time-sharing processing, many users can work with the computer through terminals that are connected to remote distance. Here, the processor time is shared among variable number of users at essentially the same time, that is, it allows simultaneity and concurrency. Each user is… Click here to order the complete third term Computer Science Lesson Note for JSS1
Week 3:
TOPIC: THE DEVICES
DEFINITION
CLASS OF DEVICES
DEFINITION OF A DEVICE
Devices are instruments, equipments or machines made to perform specific functions.
CLASS OF DEVICES
Devices can be classified into four types:
• Early counting devices
• Mechanical devices
• Electrical device
• Electronic device
• Analogue device
EVALUATION
1. What is a device?
2. List the five classes of device.
1. Early counting devices: Examples of this include stones,pebbles,beads,fingers and toes,sticks,grains,marks on the wall etc.
2. Mechanical devices: mechanism consisting of a device that works on mechanical principles. Examples of this include ship, cart, sewing machine, motorcycle, car, typewriter, wheel barrow, Abacus, Slide rule, Napier bone, Pascaline, Jacquard’s loom, Babbage’s analytic engine
3. Electrical devices: take the energy of… Click here to order the complete Lesson Note on Computer Science JSS1 third term
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