FINALS

• Mobility in information technology means the ability to access information electronically from different locations outside of the home or office.
• Mobile connectivity is limited only by the availability of cellular or data networks.
• Mobile devices have self-contained power in the form of rechargeable batteries, are generally small and lightweight, and do not rely on other connected peripheral devices, such as a mouse and keyboard, to operate.
• Laptops offer device connection options such as USB and HDMI.
• Laptops are portable computers. They usually run full versions of operating systems such as Microsoft Windows, MacOS or Linux.
• Smartphones differ from laptops in that they run special operating systems that are designed for mobile devices.
• A GPS receiver in the phone uses satellites to determine the geographic location of the device.
• Tablets are similar to smartphones in that they use special mobile operating systems like Android or iPadOS.
• E-readers, such as the Amazon Kindle, are special purpose devices with black and white displays that have been optimized for reading text.
• Wearables are smart devices that are meant to be worn on the body or attached to clothing. Two popular wearables are smartwatches and fitness trackers.
• Smartwatches are a type of wearable that includes a microprocessor, a special operating systems, and apps.
• Fitness trackers are similar to smartwatches but are limited to monitoring the body such as physical activity, sleep, and exercise.
• In Augmented Reality, computer graphics are integrated with what is seen in the real world, usually through the device camera.
• Related to AR is Virtual Reality, where a user wears a special headset which displays graphics from a separate computer.
• What memory module is used for laptops?

  SODIMM
• Laptop processors also use CPU throttling to modify the clock speed as needed to reduce power consumption and heat. This results in a slight decrease in performance.
• The purpose of the Function key is to activate a second function on a dual-purpose key.
• Give at least five examples of features that can be accessed through function keys. NOTE: Skip during multiple choice quiz.

  • Dual displays
  • Volume settings
  • Media options such as fast forward or rewind
  • Keyboard backlight
  • Screen orientation
  • Screen brightness
  • WiFi, cellular, and Bluetooth on or off
  • Media options such as play or rewind
  • Touchpad on or off
  • GPS on or off
  • Airplane mode
• Twisted Nematic displays offer high brightness, use less power than IPS, and are inexpensive to manufacture. 
• In-plane Switching displays offer better color reproduction and better viewing angles, but have low contrast and slow response time.
• Vertical Alignment uses tilting crystals to provide a much higher contrast ration than other types.
• Contrast ratio is the difference in shade between a black pixel and a white pixel. This does lower the viewing angle smaller, slow the response time, and can exhibit ghosting or motion blur.
• Fluorescent Backlight: behind the LCD screen
• Inverter: behind the screen panel
• LED Backlights: use LED-based backlights and do not have fluorescent tubes or inverters
• Wi-Fi antennas transmit and receive data carried over radio waves.
• Wi-Fi Antenna Connectors: Wi-Fi antennas in laptops are typically located above the screen.
• Wi-Fi Antenna Leads: The Wi-Fi antenna is connected to a wireless card by an antenna wire and antenna leads.
• Wi-Fi Antenna Wire Guides: The wires are fastened to the display unit by wire guides which are located on the sides of the screen.
• Most laptops today have a webcam and microphone built in. The webcam is normally positioned at the top, center of the display. The internal microphone can often be found next to the webcam.
• Power management controls the flow of electricity to the components of a computer.
• The Advanced Configuration and Power Interface (ACPI) creates a bridge between the hardware and the operating system and allows technicians to create power management schemes to get the best performance from a laptop.
• The computer is on and the CPU is running

  S0
• The CPU and RAM are still receiving power, but unused devices are powered down

  S1
• The CPU is off, but RAM is refreshed. The system is in a lower mode than S1

  S2
• The CPU is off, and the RAM is set to a low refresh rate. This mode is often called “save to RAM”. This state is known as suspend mode

  S3
• The CPU and RAM are off. The contents of RAM has been saved to a temporary file on the hard disk. This mode is called “save to disk”. This state is known as hibernate mode

  S4
• The computer is off.

  S5
• The most common Bluetooth network is Class 2, which has a range of approximately 33 ft (10 m).
• Laptops with integrated cellular WAN capabilities require no software installation and no additional antenna or accessories.