What does a computer do? Accepts data through inputting Processes data Stores data Outputs data

Input Devices Mouse Keyboard Scanner Microphone Digital Camera Voice Command Touch Screen

Output Devices Printer Monitor Speaker

Computers STORE Data in Bytes One byte is 8 bits (a bit is an off/on switch or a zero or a one) a: 01000100 One byte holds one character, numeral, or symbol such as the letter z, the numeral 3, or the symbol * Kilobyte 1 KB is 1 thousand bytes Megabyte 1 MB is 1 million bytes Gigabyte 1 GB is 1 billion bytes

Storage Devices Permanent Storage Devices USB Storage Device 256 MB - 1 GB+ Removable CD-R 700 MB Removable DVD-R 4.7 GB Removable Hard Drive 120 GB ++ Not removable Temporary Storage (stores data while processing) Random Access Memory - RAM

Saving your data at CCSF Save on your USB storage device. Use Save As the first time you are saving so that you can indicate WHERE you will store your file/data. Save often Remember, when you turn off your computer, everything in RAM is removed. Back-up important files

Computers PROCESS data fast and accurately! Central Processing Unit (CPU) (so called “brain” of the computer Speed of computer is measured in Megahertz (MHz) 1 Megahertz is a million cycles per second (ours are 450 MHz) Computers today often run at 3+ GHz Gigahertz (billion cycles per second)

Software/Programs – Instructions for the Computer Operating System Software Performs housekeeping tasks, saves and organizes files, connects all the peripherals Microsoft Windows XP (used by CCSF Business Department) Applications Software/Programs Performs specific tasks Microsoft Office 2007 is an integrated software package containing various individual programs that do different tasks – Word, Excel, Access, PowerPoint.

Four Major Programs in Microsoft Office 2007 Category Program Extension Common Output Word Processing Word .docx Letters, reports Spreadsheets Excel .xlsx Budgets, financial projections Database Access .accdb Client lists, inventory Presentations PowerPoint .pptx Trainings, promotion, publicity

Using Control and Shift Keys in selecting files/folders and data Press after you select the first one and keep holding until you select the last one Selects files/folders and data that are next to each other (contiguous or adjacent) Control Key Press as you select each one Selects non-contiguous (non-adjacent) files, folders, or data that are in random order

Using Move and Copy When you move a file, folder or data, it is no longer in its original location When you copy a file, folder, or data, it is both in its original location and in its new location.

The Ergonomics of Using Computers Maintain good posture Stand up and stretch often Rest your eyes and mind Take risks, relax, and have fun!