Sign Of Virus Infection

• A file becomes corrupted
• A program or file does not work properly
• A file or program suddenly is missing
• An unusual message or image is displayed on the computer screen
• An unusual sound or music plays randomly
• The available memory is less than what should be available
• An unknown program or file changes without explaination
• System properties change

source: Discovering Computer 2007 A Gateway To Information

CHECKLIST B01 - ICT & SOCIETY

Hampir kesemua topik dalam bab B01 telah habis dibincangkan dalam kelas. Sila pastikan anda memahami setiap bahagian, untuk itu saya menyediakan checklist di bawah dan anda harus bertanya pada diri anda dimanakah tahap anda. Jika ada bahagian yang anda masih tidak faham anda boleh bertanya kepada cikgu atau mencari maklumat daripada internet, buku atau kawan-kawan. Proses pembelajaran harus berlaku walaupun anda tiada di sekolah atau tanpa disuruh oleh cikgu.

1.0 INFORMATION & COMMUNICATION TECHNOLOGY & SOCIETY
1.1 Introduction to Information and Communication Technology
1.1.1.1 Define ICT.
1.1.1.2 Describe the brief evolution of computers.
1.1.1.3 List the usage of ICT in everyday life.
1.1.1.4 State the differences between computerised and non-computerised systems.
1.1.1.5 State the impact of ICT on society.

1.2 Computer Ethics and Legal Issues
1.2.1.1 Define Computer Ethics, Code of Ethics, Intellectual Property, Privacy, Computer Crime and Cyber Law.
1.2.1.2 Differentiate between ethics and law.
1.2.1.3 State the need for intellectual property laws.
1.2.2.1 List ways to protect privacy.
1.2.2.2 State authentication and verification technologies :
1.2.3.1 User identification, Possessed Object, Biometric device
1.2.3.2 List effects of controversial contents on society: Pornography and Slander
1.2.3.3 Describe the process of filtering to control access to controversial contents.
1.2.4.1 Explain the need for Cyber Law.
1.2.4.2 Explain briefly the computer crimes: Fraud, Copyright Infringement, Theft, Attacks

1.3 Computer Security
1.3.1.1 Define computer security.
1.3.2.1 Explain briefly the different threats to computer security:
* Malicious code * Hacking * Natural disaster * Theft
1.3.3.1 Select the appropriate security measures to overcome the computer threats
1.3.3.2 Apply the correct security procedures : Antivirus, Anti-Spyware, Firewall, Data backup
* Cryptography (Cipher text, Plain text), Human aspects

Mainframes, Supercomputers & Embedded computers

Embedded computers

Supercomputers

Mainframes
Mainframes
A mainframes is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously. Mainframes store tremendous amounts of data, instructions and information. Most major corporations use mainframes for bunisess activities. With mainframes, large business are able to bill millions of customers, prepare payroll for thousands of employees, and manage thousands of items in inventory.

Supercomputers
A Supercomputers is the fastest, most powerfull computer and the most expensive. The fastest supercomputers are capable of processing more than 100 trillion instructions in a single second. With weights that exceed 100 tons, these computers can store more than 20,000 times the data and information of an average desktop computer. Applications requiring complex, sophisticated mathematical calculations use supercomputers. Large-scale simulations and applications in medicine, aerospace, automotive design, weather forecasting, nuclear energy research use a supercomputer.

Embedded Computers

An embedded computer is aspecial-purpose computer that functions as a component in a large product. Embedded computers are everywhere - at home, in your car, and at work. The following list identifies a variety of everyday products that contain embedded computers.

• Consumers Electronics : mobile and digital telephones, digital televisions, cameras etc.


• Home Automation Devices & Appliances : microwave ovens, washing machines etc.

Source from Discovering Computers 2007