YOU ARE ACCESSING THE LCARS COMMAND INTERFACE -
Library Computer Access and Retrieval System
Star Trek followers will know that LCARS can be seen in almost every episode of The Next Generation, Deep Space Nine, and Voyager. Some of these earlier interfaces seen in The Original Series, especially from The Wrath of Khan onwards. The latest screens produced for the Enterprise series are in my opinion not LCARS, since the designs are quite different and can vary, unlike those in TNG, DS9, and VOY, where they all retain the same look.
It is also debatable whether or not the creator of the LCARS was indeed Dr. "Michael Okuda", who is regularly seen discussing LCARS and alien written languages of background graphics shown on the CD's. To try and find an actual date of the invention of the LCARS is not known, although the modern LCARS was first installed on board the Enterprise-D.
The full name "Library Computer Access and Retrieval System"could be seen in "The Price", for example.
The sickbay used in Star Trek V: The Final Frontier" is a minor redress of the Star Trek: The Next Generation sickbay, and the LCARS panels on the wall are barely altered, so this could be the first LCARS appearance. However, they do not appear in "Star Trek VI: The Undiscovered Country", or indeed the 23rd century portion of "Star Trek Generations".
Star Trek follows may notice that in the first two seasons of The Next Generation, large black rectangles are clearly visible on the LCARS displays on the bridge (and sometimes in main engineering). This was a result of the studio lights reflecting off the displays, which director of photography Edward R. Brown tried to solve by sticking cardboard onto them. When Brown was replaced by Marvin V. Rush for the third season, a number of changes in filming (including better film stock and a smaller number of lights) allowed the LCARS displays to be seen properly.
The LCARS layout has been used in several computer games such as the CD-ROM version of the Star Trek Encyclopedia, as well as the TNG and DS9 CD-ROM Companions.