REVIEW

TRUE OR FALSE

• Software is a single program or a collection of programs which performs many task and/or system related functions.

• Software is the detailed instructions that control the operation of hardware.

• Without software, hardware can not extend its capabilities or utilities.

TRUE OR FALSE

• Software manage the computer resources of the organization.

• Software provide tools for human beings to take advantage of these resources.

• Software act as an intermediary between organizations and stored information.

TRUE OR FALSE

• Software is intangible.

• Software is easy to reproduce.

• Untrained people can hack something together.

• Software is easy to modify.

IDENTIFY THE FOLLOWING SOFTWARES ACC. TO TYPE

• COBOL• MAC OS• PASCAL• MS WORD• WINDOWS XP• MS EXCEL• WORD PERFECT• UNIX

• MS POWERPOINT• OPENOFFICE

WRITER• C AND CC+++• MS DOS• WINDOWS 7• OPEN OFFICE

IMPRESS• LINUX

WEB BROWSER, LINUX, BITS AND BYTES, AND FILES

WEB BROWSER

• -IS A PROGRAM THAT YOU USE TO VIEW WEB PAGE.

• Examples

• A. Internet Explorer

• B. Netscape Navigator

• C. Mozilla FireFox

LINUX

• IS A FREE UNIX-TYPE OF OPERATING SYSTEM ORIGINALLY CREATED BY LINUS TORVALDS WITH THE ASSISTANCE OF DEVELOPERS AROUND THE WORLD. DEVELOP UNDER THE GNU General Public License- the source code for Linux is freely available to everyone.

BITS AND BYTES

• The computer only understand two things, those two things are.

• ON- is represented by the number 1.

• OFF-is represented by 0.

This is based on the BINARY NUMBER SYSTEM, this digits are known as bits.

•Bit: A bit is a binary digit. It's the most basic unit of information. It has a value of either 0 (zero) or 1 (one).•Byte: A group of eight bits. A byte can hold 256 values, from 0 to 255. Generally, a byte holds one character (A through Z, 0 through 9, etc).

BITS AND BYTES

• BIT- is a contraction of the words…

Binary dIgiTIn order for the computer to save

information it saves in terms of Bytes.

BITS AND BYTES

• BYTE- is a contraction of the words…

BinarY digiTs Eight This means that one byte consists of eight

bits. A byte is necessary in order for the computer to store a character of information. So in terms of storage space a byte can be considered to be the size of a character.

•Kilobyte: You guessed it: A thousand (actually, 1024) bytes.

•Megabyte: A million bytes

•Gigabyte: A billion bytes

Here's how the decimal base number 217 is represented in binary form. Note that because it's less than 255, it "fits" within a single byte (which contains only 8 bits). Isn't that neat? The rightmost bit represents 2 to the zero power, or 1. The bit to its left represents 2 to the first power, or 2. The third bit from the right represents 2 squared (22), or 4. The fourth bit from the right represents 2 cubed (23), etcetera. Add all eight values together; the sum is the value of the byte. 

KILOBYTES1 K

1 Thousand bytes

MEGABYTES1 MB

1 Million bytes

GIGABYTES1 GB

1 Billion bytes

FILES

• Files are clumps of computer data stored somewhere in your computer. Each file has…

• NAME

• LOCATION

• LENGTH

• DATE

WHAT DO FILES DO?

•Files hold and store information that can be read by the computer.

KINDS OF FILES

Name Inside Does/html

.com instructions It runs or execute

.exe instructions It runs or execute

.txt Readable info. To read

.gif Graphical info. To see

.htm/html Textual info. To see using a browser.

WHAT DO YOU DO WITH FILES?

• RUN THEM- if they hold program.

• LOOK INSIDE THEN- if they hold graphics information or text.

END OF THE LESSON

THANKS FOR LISTENING