REVIEW
May 16, 2015
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