Computer Information Technology – Section 1-1

Parts of the Computer Objective: To identify the parts of a computer and their uses

Parts that are visible

Monitor Mouse Keyboard

Parts of the Computer

Parallel Port Serial Port USB Ports Wired LAN/Ethernet Connection Audio Connections SVGA/Monitor

Newer Computers Fewer Interfaces No serial or Parallel HDMI for video Mix of USB3.0 and USB2.0

Parts of the Computer Definitions: Bit: A single digit number in base-2 (a zero or a one) and is the smallest unit of computer data. Byte: A byte is a set of 8 bits that represent a single character in the computer's memory. Kilobyte (KB): One kilobyte is equal to 1,024 bytes. Megabyte (MB): A megabyte is 1,024 kilobytes or 1,048,576 bytes Gigabyte (GB): A gigabyte is 1,024 megabytes or 1,073,741,824 bytes Terabyte (Tb): A terabyte is 1024 gigabytes or 1,099,511,627,776 bytes.

How much data is that? Bytes (8 bits) 1 byte: One character 10 bytes: One word (a word of language, not a computer word) Kilobyte (1024 bytes) 1 Kilobyte: Joke; (very) short story 2 Kilobytes: Typewritten page 10 Kilobytes: Page out of an encyclopedia 100 Kilobytes: Photograph, low-resolution

How much data is that? Megabyte (1,048,576 bytes) 1 Megabyte: Small novel; 2 Megabytes: Photograph, high resolution 5 Megabytes: Complete works of Shakespeare; 30 seconds of broadcast-quality video 10 Megabytes: Minute of high-fidelity sound; 100 Megabytes: Yard of books on a shelf; two encyclopedia volumes 500 Megabytes: CD-ROM

How much data is that? Gigabyte (1,073,741,824 bytes) 1 Gigabyte: symphony in high-fidelity sound; broadcast quality movie 2 Gigabytes: 20 yards of books on a shelf 20 Gigabytes: Audio collection of the works of Beethoven; 50 Gigabytes: Library floor of books on shelves 100 Gigabytes: Library floor of academic journals on shelves

How much data is that? Terabyte (1,099,511,627,776 bytes) 1 Terabyte: all the X-ray films in a large technological hospital; 50,000 trees made into paper and printed 2 Terabytes: Academic research library 10 Terabytes: Printed collection of the U. S. Library of Congress Petabyte (1,125,899,906,842,624 bytes ) 2 Petabytes: All U. S. academic research libraries 20 Petabytes: 1995 production of hard-disk drives 200 Petabytes: All printed material; 1995 production of digital magnetic tape

How much data is that? Exabyte (1,152,921,504,606,846,976 bytes ) 5 Exabytes: All words ever spoken by human beings. Zettabyte (1,180,591,620,717,411,303,424 bytes ) Yottabyte (1,208,925,819,614,629,174,706,176 bytes)

Parts of the Computer Definitions: Serial Port: The serial port is a type of connection used for peripherals such as mice, gaming controllers, modems, and older printers. A serial port can only transmit one bit of data at a time, whereas a parallel port can transmit many bits at once. The serial port is typically the slowest port you'll find on a PC and has a top speed of about 1.3 Mbs or 1,382,400 bps.

Parts of the Computer Definitions: Parallel Port: This interface is found on the back of older PCs and is used for connecting external devices such as printers or a scanners and is used for transmitting data in parallel, or more than one bit at a time. Parallel ports have a maximum speed of about 6 Mbs (megabytes per second) or 6,291,456 bps (bits per second).

Parts of the Computer Definitions: USB Port: Universal Serial Bus. A personal computer external bus standard which can support up to 127 peripheral devices, can support plug-and-play (hot plugging). The speeds for USB ports depends on the type of the port: Low Speed (1.5 Mbps) Full Speed (12 Mbps) High Speed (480 Mbps) Super Speed (5 Gbps) USB 1.1 USB 2.0 USB 3.0

Parts of the Computer Definitions: SVGA: Super Video Graphics Array. A video display standard for color monitors. SVGA monitors display up to 16.7 million colors with resolutions up to 1,280 x 1,024 pixels. Ethernet/LAN: Ethernet is a standard for connecting computers into a local area network (LAN). The most common form of Ethernet is called 10BaseT, which denotes a peak transmission speed of 10 Mbps using copper twisted-pair cable. Many networks are now 100Mbps or 1000Mbps

Summary There are many different external interfaces Different uses Different speeds Rest of Today Complete Homework 1-1 – Put it in the “IN” folder on the shelf.