Multi-monitor

[4] Measurements of the Institute for Occupational Safety and Health of the German Social Accident Insurance showed that the quality and quantity of worker performance varies according to the screen setup and type of task.

[6] In many professions, including graphic design, architecture, communications, accounting, engineering and video editing, the idea of two or more monitors being driven from one machine is not a new one.

[7] Early versions of Doom permitted a three-monitor display mode, using three networked machines to show left, right, and center views.

Although large screen technology such as CRT rear projection was beginning to be used more often, multi-monitor games were still occasionally released, such as Sega's F355 Challenge from 1999 which again used 3 28" monitors for the sit-down cockpit version.

The most recent use of a multi-monitor setup in arcades occurred with Taito's Dariusburst: Another Chronicle game, released in Japan in December 2010[13] and worldwide the following year.

In practice, and with recent cards, this mode is being phased out because it does not make very good use of GPU parallelism and does not support arbitrary arrangements of monitors (they must all be horizontal).

A more recent technique uses the wglShareLists feature of OpenGL to share data across multiple GPUs, and then render to each individual monitor's frame buffer.

Today's second display has evolved from a multi screen personal computer monitor to having multiple technical features such as a touchscreen, web cam or even a barcode reader in stores.

The European Union Intellectual Property Office rejected a trademark application for "second display" by LG Electronics, citing that the term was not distinctive.

The displays can also be used for different kinds of user input – for example entering an email to receive an electronic receipt, give feedback or sign up for loyalty to the customer relationship management (CRM) system.