Oracle of the People
The Oracle of the People was the name for the central computer of the Yonada worldship built by the Fabrini. The inhabitants of Yonada revered the Oracle as a deity.

Description 
The High Priestess accessed the Oracle at the Oracle Room, which contained the physical representation of the Oracle, a tall pilaster decorated with a stylized sunburst. The center of the sunburst contained a round crystal that glowed when the Oracle communicated with its chief worshiper. The Oracle Room also contained a kneeling platform, which served to place the priestess in a properly respectful position, and to attract the machine's attention. These facilities formed an access point or terminal that permitted natural language interaction with the Oracle. There is empirical evidence that the Oracle did not pay attention to this access point until someone knelt on the platform. That action drew the machine's attention, signified by an increase in the ambient lighting and illumination of the central crystal, but the machine did not speak until spoken to. It is unknown whether this interface supported interaction other than that of worshiper and deity, but it seems unlikely, since the  crew had to enter the control room and make adjustments there in order to correct a system fault. The Oracle room contained a number of triangular slabs affixed to the walls, that bore Fabrini writing. It also contained a stele that housed the Book of the People.

Within the Oracle Room, the machine had two chief defensive mechanisms. It could direct electricity sufficient to stun up to at least three Human-sized individuals simultaneously. It could also operate heating elements concealed within certain of the carving panels that could raise the temperature of the room to lethal levels in very short order. Outside of the Oracle Room, the machine enforced its will through the use of the instrument of obedience.

The Oracle concealed the entrance to the control center of Yonada. Using the Book of the People, Spock discovered that applying pressure to the central crystal of the Oracle for several seconds opened this concealed door – the Oracle itself slid open to reveal a small trapezoidal hatch. The same operation opened a sliding door covering this hatch. On the other side of the hatch was the main control room.

During the course of Yonadas voyage, the computer had malfunctioned and diverted the ship's course toward Daran V. Instead of being a world for the population of Yonada, the vessel was on a collision course that would kill all on board and the people of the planet. In 2268, Captain James T. Kirk, Commander Spock, and Dr. Leonard McCoy successfully disabled the computer and corrected the worldship's course to its originally intended destination. ()

Appendices

Background information 
The voice of the Oracle was provided by James Doohan. ()

Apocrypha 
In the novel Ex Machina the origins of the Oracle were revealed.  The creators had put the Oracle in place not to rule over the Fabrini but instead to provide guidance and support to the leaders on Yonada over the thousands of years it would take to reach the promised world, which was named Lorina in the novel.  Several thousand years after Yonada's launch a series of conflicts led to a fundamentalist regime came to power and reprogrammed the Oracle to rule over the Fabrini to ensure it reached Lorina.

After the Oracle was shut down and Yonada arrived at Lorina a group of extremist Yonadans led by Dovraku, still believing in the Oracle – as their society had no concept of computers, they assumed that all computers were gods rather than dismissing gods as machines – attempted to use Spock to reactivate and improve the Oracle after his encounter with V'ger, seeing V'ger as evidence of their beliefs.  Dovraku forced Spock to mind meld with both him and the Oracle.  Spock was able to find the childhood trauma that had driven Dovraku and forced him to face it, rendering him comatose.  He then was able to take direct control of the Oracle through the meld and shut it down again.  During his time in the meld, Spock learned of an ancient data bank that the Oracle considered to be missing.  Locating the data bank the Enterprise crew was able to discover the origins of the Oracle.

See Also 
 

Mythological figures
Computer technology