### device | machine | computer:

Laptop
* Many laptops have a hardware volume control
  - small trackball beneath the keyboard
* Most laptops can stay suspended, using battery power alone, for several days
  - come with a slot that allows a lock to be inserted
  - dissipate heat through the bottom
* Most laptops have batteries
  - software
  - two slots on the side where an ethernet card or modem card can be inserted
  - only have a single serial port
* Some laptops come with ethernet built-in
  - video outputs
* Some laptops have a tiny mechanical switch that turns the screen off when the lid is folded down
  - power down functions
  - turn off ports to conserve energy
* Some laptops use SIMMs, some DIMMs, and many use proprietary memory cards
  - but most use proprietary memory cards
* also have a smaller footprint than desktop computers.
* are also more expensive than desktop systems
  - an extension of people s offices and their personal lives
  - ancient history
  - especially vulnerable to damage and loss
  - fragile and can easily be damaged by shock and vibration
* are generally more expensive than desktop computers
  - desktops
  - heavy, expensive, easily stolen, and have limited battery life
* are just laptops
  - small desktop computers with the same modality of use
  - lightweight and can operate on batteries
* are located in desks
  - internet cafes
  - meetings
* are made of chips
  - plastic
  - mobile computers
* are more expensive and less expandable, but they are portable
  - more prone to theft and damage than desktops
  - notorious for their pale displays
* are often a mobile worker's only computer
  - specialized or contain proprietary hardware
  - particularly vulnerable to information theft because of their mobility
  - portable computers
* are small, but some are smaller than others
  - wireless, resource-minimal and portable
* are usually as useful for homework as they are for schoolwork
  - half a generation behind the latest desktop technology
* can also take the place of desktops in a traditional lab setting
  - be heavy to carry
  - have CD-ROM drives that are internal or external to the machine
  - often cost more than desktops
  - produce vast amounts of information
* come with similar processors, memory, modems and hard drives.
  - parallel ports
* includes action mechanisms.
* includes computer accessories
  - storage
  - electron guns
  - keyboards
  - memory boards
  - monitors
  - mother boards
  - resistors
  - sections
* make document files and applications mobile.
* mean mobility and saved desk space, which is often at a premium.
* now feature almost all the power of desktops.
* often use trackballs and touch pads to save space.
* promote hands-on learning, making information easier to learn and remember.
* provide Internet access through a wireless network connection or an ethernet connection.
* require batteries, and batteries require charging.
* sometimes use cards that look like small floppies.
* use fleas instead of grasshoppers, and tiny red ants.
* use significantly less energy than desktop computers
* usually have a flat screen and LCD display, and are powered by a rechargeable battery.
* vary in screen size.
+ Digital Visual Interface: Computer hardware
  * The DVI standard has is widely used in the personal computer industry. Many desktop personal computers and monitors can use it. HDMI is another video interface standard. Many laptops still have legacy VGA ports. Many newer models have HDMI ports.