The document provides an overview of the history and components of personal computers. It discusses how early computers led to developments in input/output devices and graphical user interfaces. It describes the major hardware components of a PC, including the motherboard, processor, memory, storage devices, and input/output ports. The motherboard serves as the central connection point and contains the CPU, memory, and expansion slots. Buses on the motherboard allow communication between the CPU and other devices.

3. Where did HCI innovations and philosophy come from? Who were the major personalities? What were the important systems? How did ideas move from the laboratory to the market?

5. From Image Shack web site //www.imageshack.us ; original source unknown

34. Figure 1-2 All communication, storage, and processing of data inside a computer are in binary form until presented as output to the user IMD203 : IT Maintenance & Support Service 1

37. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-6 The two most popular output devices are the monitor and the printer

39. Figure 1-8 Inside the computer case IMD203 : IT Maintenance & Support Service 1

41. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-9 All hardware components are either located on the motherboard or directly or indirectly connected to it because they must all communicate with the CPU

42. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-10 A motherboard provides ports for common I/O devices

44. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-12 This motherboard uses two chips in its chipset (notice the bus lines coming from each chip used for communication)

46. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-13 Memory is a temporary place to hold instructions and data while the CPU processes both

48. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-14 A SIMM, DIMM, or RIMM holds RAM and is mounted directly on a motherboard

50. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-16 Hard drive with sealed cover removed

51. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-18 Two IDE devices connected to a motherboard using both IDE connections and two cables

53. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-22 A motherboard usually provides a connection for a floppy drive cable

55. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-26 A data bus has traces or lines that carry voltage interpreted by the CPU and other devices as bits

57. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-29 PCI bus expansion slots are shorter than ISA slots and offset farther; the one AGP slot is set farther from the edge of the board

59. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-31 This circuit board is a modem card and is mounted in a PCI slot on the motherboard

61. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-35 The motherboard receives its power from the power supply by way of one or more connections located near the edge of the board or near the processor

63. A+ Guide to Managing and Maintaining your PC, 6e Figure 1-36 This firmware chip contains flash ROM and CMOS RAM; CMOS RAM is powered by the coin battery located near the chip