Indicates what type of operating system has been pre-installed. Most computers come with a pre-installed operating system, so the buyer is spared a lengthy installation process. The most common operating system is Windows XP for home use, while Windows NT is more suitable for offices. Mac OS is mostly used in the media and advertising business.

The type of optical drive determines what type of discs the laptop can read and/or write to.

Mouse type refers to the type of interface used. For laptops, it is mostly Touchpad, Trackpoint or a combination of the two.

Indicates if the laptop comes with a fingerprint reader, which will make it possible to use your finger as password.

HDMI (High-Definition Multimedia Interface) is the first and only industry-supported, uncompressed, all-digital audio/video interface. By delivering crystal-clear, all-digital audio and video via a single cable, HDMI dramatically simplifies cabling and helps provide consumers with the highest-quality home theater experience. HDMI provides an interface between any audio/video source, such as a set-top box, DVD player, or A/V receiver and an audio and/or video monitor, such as a digital television (DTV), over a single cable. HDMI supports standard, enhanced, or high-definition video, plus multi-channel digital audio on a single cable. It transmits all ATSC HDTV standards and supports 8-channel, 192kHz, uncompressed digital audio and all currently-available compressed formats (such as Dolby Digital and DTS), HDMI 1.3 adds additional support for new lossless digital audio formats Dolby TrueHD and DTS-HD with bandwidth to spare to accommodate future enhancements and requirements.

Indicates that the laptop supports WLAN (Wireless Local Area Network). All products supporting WLAN can communicate with each other. Common Wi-Fi standards are: IEEE 802.11a, 802.11b, 802.11g.

Indicates which WLAN standard that is supported by the laptop. 802.11a, 802.11b and 802.11g are Wi-Fi standards, with different speeds.

A laptop with TV-out function can be connected to a TV in order to display the laptop image on a TV-screen. Most laptops use an S-Video out connection for this purpose.

Indicates if the player has support for memory cards. Could be SecureDigital (SD), MultiMediaCard (MMC) or any other type of memory card. A memory card reader can be used to display pictures stored on memory cards.