Division Rules in Arithmetic Operations

Division Rules

• When both operands in a division expression are integers, the result is an integer, and the fractional portion is discarded.
• Examples of integer division:
  • 17 divided by 5 equals 3
  • 35 divided by 9 equals 3

Division with Real Numbers

• When one or both operands in a division expression are real numbers, the result is a real number.
• Examples of division with real numbers:
  • 17.5 divided by 5 equals 3.5
  • 17 divided by 5.5 equals 3.09
  • 17.5 divided by 5.5 equals 3.1818

Biometric-Input Devices

• Biometrics is the science of measuring individual body characteristics to identify a person.
• Biometric characteristics include fingerprints, hands, eyes, voice, and facial features.

Output Devices

• Display screens include LED, LCD, and Plasma.
• Display resolution is a measure of the number of pixels on the screen, represented in width by height.
• Printers include plotters, photo printers, multi-function printers, and 3D printers.

Source Data-Entry Devices

• Scanners are used to capture data.
• Bar-Code Readers are used to capture data.
• RFID (Radio Frequency Identification) is used to capture data.
• Image capturing devices include digital cameras and webcams.

Audio-Input Devices

• Speech-Recognition Systems use a microphone or telephone as an input device.
• Speech-Recognition Systems convert a person's speech into digital signals by comparing against 200,000 or more stored patterns.

Processing

• Cache temporarily stores instructions and data that the processor uses frequently to speed up processing.
• The CPU works much faster than RAM, so it often must wait for information from RAM, which cache helps to alleviate.

Secondary Storage

• Hard Disks are still the major secondary-storage device for desktop/tower computers.
• Hard Disks use a read/write head to access and store data.