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1、Unit 4 Application Software,计算机专业英语,郭敏 徐莹 杨阳,Unit 4 Application Software,Section1 Situational Dialog My Computer Has Been Attacked by Viruses Section 2 Passages Passage A. Software Categories Passage B. Computer Security Section 3 Skill in Focus Translation Skills, Part 1Translation of Compound Term
2、s and Abbreviations Section 4 Extended Reading An Introduction to Microsoft Office Office Heads into the Clouds S Korea Security Firm Says Another Web Attack to Hit Tips: Keep Your PC Safe from Scareware,Unit 4 Application Software,Section 1 Situational Dialogue,Unit 4 Section 1,The Computer Festiva
3、l has begun, and theres a large crowd of students around the enquiry desk. Zhang Ning and Li Bin are answering questions from the students. Cheng Hong: My computer seems to have been attacked by viruses, for it runs very slowly and often gets crashed. Zhang Ning: Nowadays our machines may easily be
4、attacked by viruses for they spread so quickly on the Internet, coupled with the constant use of mobile storage devices, even if anti-virus software and firewalls are installed. You may take a look at our leaflets about anti-virus protection. Cheng Hong: So it is! Sometimes there will be alert again
5、st viruses when I browse web pages, and theres much rouge software somehow installed in my computer. Really annoying! I can never kill all those viruses in my computer. Even system restoration wont work, maybe because other partitions have been infected. I wonder if your service team may help me wit
6、h this.,Unit 4 Section 1,Zhang Ning: Sure! You can make a reservation first, and well contact you when our service team is available. Cheng Hong: Great! I can still consult them about some software problems. Zhang Ning: Members of our service team are all from our Computer Society. Here we are tryin
7、g to improve our professional skills by learning and practice. You may join us if you are interested. Cheng Hong: I am interested! You know, Ive entered for your Public-interest Design Competition. I do hope to learn from you. Zhang Ning: Welcome to join us! By the way, pay more attention while usin
8、g flash disks. You see, some of the entries for the competition carry viruses. We wont fall victim to them, of course,Unit 4 Application Software,Section 2 Passage A：Software Categories,Unit 4 Section 2 Passage A,record physical device Compiler Loader Linker Interpreter Java architecture Intel Penti
9、um Execution boot shut down power off Editor Library machine code address space Instruction database,spreadsheet software suite data flow CRM SCM IT Helpdesk Email blog Media Player Web browser multimedia HTML CAD CAE IDE API MS,Unit 4 Section 2 Passage A,Computer software, or just software is a gen
10、eral term primarily used for digitally stored data such as computer programs and other kinds of information read and written by computers. Today, this includes data that has not traditionally been associated with computers, such as film, tapes and records. The term was coined in order to contrast to
11、 the old term hardware (meaning physical devices); unlike hardware, software is intangible, meaning it “cannot be touched”. Software is also sometimes used in a more narrow sense, meaning application software only.,Unit 4 Section 2 Passage A,Software is often divided into two categories: system soft
12、ware and application software.,Unit 4 Section 2 Passage A,System software is a generic term referring to the computer programs used to start and run computer systems and networks. Examples of system software are: Operating Systems, the Compiler, the Loader, the Linker, and the Interpreter. OS, as de
13、scribed in Unit 3, acts as an interface between the application programs and the machine hardware. A compiler is a program that translates a source program written in some high-level programming language (such as Java) into machine code for some computer architecture (such as the Intel Pentium archi
14、tecture).,Unit 4 Section 2 Passage A,A loader is the part of an operating system that is responsible for loading programs into memory, preparing them for execution and then executing them. The loader is usually a part of the operating systems kernel and usually is loaded at system boot time and stay
15、s in memory until the system is rebooted, shut down, or powered off. A linker or link editor is a program that takes one or more objects generated by compilers and assembles them into a single executable program. Linkers can take objects from a collection called a library. The objects are program mo
16、dules containing machine code and information for the linker. The linker takes care of arranging the objects in a programs address space.,Unit 4 Section 2 Passage A,An interpreter is a computer program that translates and executes instructions written in a computer programming language line-by-line, unit by unit etc. An interpreter needs to be able to analyze, or parse, instructions written in the source language. In contrast, application software (also called end-user programs) inclu
