Difference between Windows and MAC
Windows OS
Advantages
User friendly environment
Many types of softwares available
Most of the people know how to operate windows
Disadvantages
Viruses can attack easily
Expensive
MAC OS
Advantages
Easy to use
No virus attacks
Disadvantages
There is not much software.
Most of the people do not know how to use
Repairing a machine is little bit expensive comparing to windows machines
Application software consists of programs design to perform specific tasks for user. Popular application software includes word processing software, spreadsheet software, and database software and presentation graphics software memos.
Applications software needs an operating system to install and operate it and the operating system needs hardware to make all the performance. Operating system cannot work with out hardware
Application software is available as:-
Boot Phase | Description |
Boot PROM | 1. The PROM displays system identification information and then runs self-test diagnostics to verify the system's hardware and memory. |
| 2. Then, the PROM loads the primary boot program, bootblk, whose purpose is to load the secondary boot program (that is located in the ufs file system) from the default boot device. |
Boot Programs | 3. The bootblk program finds and executes the secondary boot program, ufsboot, and loads it into memory. |
| 4. After the ufsboot program is loaded, the ufsboot program loads the kernel. |
Kernel Initialization | 5. The kernel initializes itself and begins loading modules by using ufsboot to read the files. When the kernel has loaded enough modules to mount the root (/) file system, the kernel unmaps the ufsboot program and continues, using its own resources. |
| 6. The kernel creates a user process and starts the /sbin/init process, which starts other processes by reading the /etc/inittab file. |
init | 7. The /sbin/init process starts the run control (rc) scripts, which execute a series of other scripts. These scripts (/sbin/rc*) check and mount file systems, start various processes, and perform system maintenance tasks. |
An Operating system (OS) is a set of programs containing instructions that coordinate all of the activities among computer hardware resources.
Ex: - The OS recognizes input from an input device such as keyboard, mouse or microphone, coordinates the display of output on the monitor, instructs a printer how and when to print information; and manages data, instructions and information stored on disk. A computer cannot not function without an operating system
Function of an OS
Different types of operating systems
Microsoft: - Windows 7, Windows Vista, Windows XP
MAC: - OS X Snow leopard, Mac OS X Public Beta, Mac OS X 10.x
Open source:- Linux, Red Hat, Ubantu
Monitor is a display device.
Samsung Sync Master BX2440 LED - LCD display - TFT - 24"
Price AUD $280
Printer
Printer is an output device witch gives hard copyies
Scanner
Scanner is an input device
Price AUD $80 canon-lide-100-flatbed-scanner
Keyboard and Mouse
Both are input devices. Keyboard is mostly used in typing and the mouse is used as appointing device
Price AUD $ 30
Mother board
A motherboard is the underlying circuit board of a computer and all the internal and external dividers are connected to it,
Price AUD $100 - $200
Graphics Card
A graphics card is the component in your computer that handles generating the signals that are sent to the monitor or "graphics"
Price AUD $ 50 - $150
Ram
Ram provides space for your computer to read and write data to be accessed by the CPU.
Price AUD $ 120 8GB
DVD ROM
DVD-ROM drives can store up to 4 GB of data or about 6 times the size of a regular CD. It is a storage device.
Price AUD $ 40
A network interface card is a device that lets computers connect on a network
Price AUD $ 50
HD is a storing device that allows users to save their data.
Price AUD $100 2T
Power supply is a device that supplies electrical energy to the computer.
Price AUD $50 Power Supply 420W
