1. CMIT 100
Input / Output

2. Basic Computer System Operation
Input
Process
Output
Basic Computer System Operation

3. System Types: Microcomputer Platforms PC (personal computer)
Applies to all desktops and laptops, not just Windows systems
Platforms
Wintel (legacy term for Windows / Intel)
OSX
Minicomputers
Mainframes
IOS
Android
Etc.

4. Input devices Keyboard Mouse Microphone Input Process Output
Allows the user to input commands to the system
Keyboard
Mouse
Microphone

5. Process CPU – Central processing unit The “Brain” Input Process Output
Receives information from input device
The “Brain”
Processes digital information
Binary numbering system
1’s and 0’s

6. Input
Process
Output
Output devices
Receives the information from processor and output it to the user
Monitor
Printer
Speakers

7. Understands only ones and zeros
Input
Process
Output
User interface
User interface
CPU
Understands only ones and zeros
Operating system
Converts the input from the user into the digital information required by the processor
Operating system
Converts the ones and zeros processed by the CPU back into an interface understood by the user

8. “Software that allows the user to interface with the hardware.”
Input
Process
Output
Hardware
Software
Operating system
“Software that allows the user to interface with the hardware.”

9. Operating system Software Files Filenames Software = files
Files contain information
Executable files (.EXE, .COM, .BAT. .MSI, .DMG)
Files accessed by the executables (.DLL, .SYS, .INF)
Filenames
The extension is indicative of what type of file it is
.EXE is executable
.DOCX is a Microsoft Word Document
Covered more in a future chapter

10. Temporary and permanent storageOS OS
Input
Process
Output
Storage devices
Temporary and permanent storage

11. Figure 1-1 Computer activity consists of input, processing, storage, and output

12. System storage: Permanent storage “Filing cabinet”
Files are stored permanently until deleted or destroyed
HDD, CD / DVD, UFD, UHD, SSD
When the power to the system is turned off the files remain

13. System storage: Temporary storage “Desktop”
Files are opened, or executed, from the filing cabinet (permanent storage) and placed on the desktop (temporary storage) by the operating system, where they are accessed by the user
System RAM, random access memory
When the power to the system is turned off, the files on the desktop are erased
In reality, the operating system opens a copy of the file from the permanent storage device and places it in temporary storage… the original file remains