Upcoming SlideShare
×

Computer with terms

474 views

Published on

Published in: Technology
0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total views
474
On SlideShare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
16
0
Likes
0
Embeds 0
No embeds

No notes for slide

Computer with terms

1. 1. ComputersGuilford County SciVis V202.01 With Terms
2. 2. Computers Bits and Bytes
3. 3. Bits and Bytes  Bits -- Computers operate using the “base-2” number system, also known as the binary number system. We use binary numbers because it is easier to implement with current electronic technology.  The word bit is short for the words “Binary digit.”  Bits have only two possible values: 0 and 1. Therefore, a binary number is composed of only 0s and 1s like this: 1011.
4. 4. Bits and Bytes Bits are rarely seen alone in computers. They are bundled together in 8 bit collections called bytes. The eight-bit byte is something that was settled on through trial and error over the past 50 years. With 8 bits in a byte (28), you can represent 256 values ranging from 0 to 255. You need 8 bits of information to allow enough combinations just to cover the keys on the keyboard
5. 5. Bits and Bytes When you start talking about lots of bytes, you get into prefixes like Kilo, Mega and Giga. In decimal systems, kilo stands for 1,000, but in the binary system, a kilo is 1024 (2 to the 10th power). Technically, a kilobyte is 1024 bytes, but it is often used loosely as a synonym for 1000. For example, a computer that has 256K memory can store approximately 256,000 bytes. 1.44 MB
6. 6. CD: 700 MBBits and Bytes KiloK 210 = 1, 024 thousand Mega M 220 = 1,048,576 million Giga G 230 = 1,073,741,824 billion TeraT 240 = 1,099,511,627,776 trillion Peta P 250 = 1,125,899,906,842,624 Exa E 260 = 1,152,921,504,606,846,976 Hard Drive: DVD: 4.7 GB 30G-150G who knows?
7. 7. Bits and Bytes Conversions  To convert bytes to kilobytes, divide the bytes by 1000.  To convert kilobytes to megabytes, divide the kilobytes by 1000.  To convert megabytes to kilobytes, multiply the megabytes by 1000.
8. 8. Hard Disk Drives and data storage The hard drive is where all of your programs and data are stored. The hard drive is the most important of the various locations of permanent storage. The hard drive differs from other primary storage in three ways: size (usually larger), speed (usually faster) and permanence (usually fixed in the PC and not removable).
9. 9. Hard Disk Drives and data storage The hard drive plays a significant role in the following important aspects of the computer system:  Performance -- the speed at which the PC boots up and programs load is directly related to hard disk speed. The hard disk’s speed is also critical when multitasking or when processing large amounts of data such as graphics work, sound and video editing, or databases work.
10. 10. Hard Disk Drives and data storage  Storage Capacity -- A bigger hard drive lets you store more programs and data. The storage capacity is extremely important when doing graphics and sound work as these mediums use tremendous amounts of storage.  Software Support -- Newer software needs more space and faster hard disks to load