Short answers, pulled from the story.
The Legend of Zelda was first released in Japan in February 1986 on the Famicom Disk System. A cartridge version for the Nintendo Entertainment System followed in the United States on the 22nd of August 1987, and in Europe on the 27th of November 1987.
The Legend of Zelda was created by Japanese game designers Shigeru Miyamoto and Takashi Tezuka. Miyamoto inspired the series from childhood explorations near his home in Sonobe, Japan, while Tezuka developed the story and setting, drawing from works such as J. R. R. Tolkien's The Lord of the Rings.
Princess Zelda was named after the American novelist, socialite, and painter Zelda Fitzgerald. Series co-creator Shigeru Miyamoto chose the name because he thought it sounded "pleasant and significant".
The Triforce is a sacred relic left behind by three golden goddesses, Din, Farore, and Nayru, after they created the world of Hyrule. It manifests as three golden triangles representing Power, Courage, and Wisdom, and can grant any wish to its user. If someone without a balanced heart attempts to use it, it splits into three parts that bond with different individuals.
As of the source material, The Legend of Zelda series includes 21 mainline entries released across Nintendo's major game consoles since 1986, in addition to a number of spin-off titles.
Ocarina of Time holds a Metacritic score of 99 out of 100, which Guinness World Records listed as the highest-rated video game in history. The game also received a perfect 40/40 from Famitsu and was ranked by Nintendo Power as the best game released for a Nintendo console in February 2006.