1. Chapter 1 Desktop Computer
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Chapter 1 Desktop Computer
Refer to page 1 in the text.
A desktop computer and its components are designed to fit on or under a desk.
The physical components of the computer, such as the monitor and system unit, are called hardware.
Data and instructions are entered into the computer using input devices, such as a keyboard, mouse, scanner, CD-RW/DVD drive, and disk drive.
Printers and scanners are peripheral devices which are attached to a port on the computer.
Processed data is conveyed using output devices such as monitors and disk drives.
The base unit contains the motherboard, which is the main circuit board.
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2. Chapter 1 Data Flow Refer to page 2 in the text.
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Chapter 1 Data Flow
Refer to page 2 in the text.
All data flows through the CPU.
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3. Chapter 1 LAN Using a Bus Topology
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Chapter 1 LAN Using a Bus Topology
Refer to page 7 in the text.
The bus topology is a physical LAN topology that uses a single central cable, called the bus or backbone to attach each node directly.
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4. Chapter 1 LAN Using a Star Topology
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Chapter 1 LAN Using a Star Topology
Refer to page 8 in the text.
In a star topology, each node is attached to a hub, which is a device that joins communication lines at a central location on the network.
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5. Chapter 1 LAN Using a Ring Topology
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Chapter 1 LAN Using a Ring Topology
Refer to page 8 in the text.
In a ring topology, each node is connected to form a closed loop. A LAN with a ring topology can usually cover a greater distance than a bus or star topology.
© 2007 Lawrenceville Press

6. Chapter 1 Decimal to Binary
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Chapter 1 Decimal to Binary
Decimal Binary Base 2 Equivalent
0 0 =0×21+0×20 =0×2+0×1 =0+0
1 1 =0×21+1×20 =0×2+1×1 =0+1
2 10 =1×21+0×20 =1×2+0×1 =2+0
3 11 =1×21+1×20 =1×2+1×1 =2+1
4 100 =1×22+0×21+0×20 =1×4+0×2+0×1 =4+0+0
Refer to page 9 in the text.
In the binary, or base two, number system, each place value is represented by a power of 2.
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7. Chapter 1 Storing Data in Memory
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Chapter 1 Storing Data in Memory
Refer to page 10 in the text.
Data stored in memory is referred to by an address.
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8. Chapter 1 E-mail Address
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Chapter 1 Address
Refer to page 15 in the text.
An address is required in order to send and receive messages. addresses are provided when you sign up with an ISP or an online service.
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9. General citation for material located at a Web site:
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Chapter 1 MLA Citations
General citation for material located at a Web site:
Author’s Last Name, First Name MI. "Document Title." Site Title and last updated date. Access date. Organization name. <URL>.
Example citation of a personal Web site:
Rawlings, Julie. Home page. 23 Dec May < index.htm>.
continued next slide
Refer to page 17 in the text.
A widely accepted form for citation is published by the Modern Language Association (MLA) in its publication MLA Handbook for Writers of Research Papers, Fourth Edition.
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10. Chapter 1 MLA Citations, continued
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Chapter 1 MLA Citations, continued
Example citation of an article in an online magazine:
Schiffman, Paula. "Making Vinegar at Home." Vinegar Monthly Vol. 1 4 May Oct < vinegarassoc/journal.asp>.
Example citation of a posting to a discussion list:
Cruz, Anthony. "Are Orchestras Going Downhill?" Online posting. 10 June Oboe Discussion Group. 23 Nov <
Refer to page 18 in the text.
Additional MLA citation examples are shown here.
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