Computer - Ministry of Higher Education and Scientific Research - 2024-2025 PDF

Ministry of Higher Education and Scientific Research Collage of Al-Zahrawi Department of pharmacy Computer Prepared by Lecturer Aiman Hasan Mohammed Department of pharmacy/1 2024-2025  Definition of computer It is...

Ministry of Higher Education and Scientific Research Collage of Al-Zahrawi Department of pharmacy Computer Prepared by Lecturer Aiman Hasan Mohammed Department of pharmacy/1 2024-2025  Definition of computer It is an electronic device that receives data in order to process it by performing a set of arithmetic and logical operations on it according to a series of instructions (programs) stored in its memory, and then outputs the results of the processing to various output units based on the user’s request. BY: AYMN HASAN Desktop Computer LAPTOP Computer(PC)Portable The most important operations performed by the computer: 1- Input operations. 2- Output operations. 4- Logical operations. 3- Arithmetic operations. 5- Storage operations 6- recoveries.  Some important definitions 1-DATA: is a collection of facts that are collected and entered into the computer to be processed and produce results. It is also known as information before processing. 2-PROCESSING: All operations performed on data, such as arranging, organizing, searching, sending, saving, deleting, adding, inserting, outputting, etc. 3- INFORMATION: The set of results that we obtain from the computer after processing the data, also known as the data after processing it.  How a computer works Output Input data processing information  Computer measurement units and storage capacity A bit is the smallest unit of measurement and consists of only one digit, a zero or a one. BYTE is equal to 8 bits, used to store only one character, and represents 8 binary numbers. BY: AYMN HASAN  Unit Measurement code KILOBYTE 1024 bytes KB MEGABYTE 1024 KB MB GIGABYTE 1024 MB GB TERABYTE 1024 GB TB PETABYTE 1024 TB PB EXABYTE 1024 PB EB BY: AYMN HASAN Computer Components Software Hardware OS(operating system) Utility drivers Ready-made application programs User-specific programs Control processing unit The central processing unit performs three main functions: Read instructions from memory and fetch a copy of them for processing FETCH: Fetch 1.0 Translating what the instructions are supposed to do into the binary system DECODE: decoding Instructions EXECUTION: Execute RAM(Random Access Memory & ROM(Read Only Memory) CASH MEMORY It is an electronic memory specific to the processor and is usually: It is used to store some private and recurring data to back to this data quickly. CLOUD STORAGE It is a model of online storage, where data is stored on virtual servers. Virtual servers (clouds) are hosting companies that manage huge data centers. People who want to store their data buy or rent capacity storage from these companies. One of the most prominent examples of cloud storage is OneDrive from Microsoft, Dropbox, and Google Drive. Examples of different types of operating systems Personal computers -Disk Operating System (Dos) -Microsoft Windows operating system -Mac OS -Linux operating system -UNIX operating system For Smart Devices iPhone Operating System (IOS) Android Measurement Computer performance CPU speed. Random memory size. Hard disk capacity. BY Aiman. H Questions 1- Mention some of Input device in the computer. 2- 6. Cloud storage is the process of storing data via: A. Hard disk B. Internet C. Processor D. DVD 3- what is the size of the Megabyte (MB) unit of measurement for any file inside the computer? 4-What are examples of cloud storage? 5- Computer performance is measured by: A. Central Processing Unit (CPU) B. B. Memory size C. C. Hard disk capacity (HARDDISK) D. D. All of the above. THANK YOU GOOD LOCK