Who knows one hundred two?
Please cite/link your sources, if possible. At some point at least twenty-four hours from now, I will:
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The number of chapters in Kav HaYashar. The word "kav," with a gematria of 102, hints to this fact. It also corresponds to the gematria of the author's first name, "Tzvi." (His second name, "Hirsh," is hinted in the word "HaYashar," which has the same letters.)
In the same vein, Rabbeinu Chananel (cited by Rosh, Eruvin 4:2) says that the rule which states that the halachah follows R' Eliezer ben Yaakov because his teachings are "kav venaki" (few in number but pure), is actually limited to 102 -- "kav" -- of his teachings.
102 are the years that Lubavitcher Chassidus was headquartered in the town of Lubavitch (Cheshvan 5574/1813 - Cheshvan 5676/1915).
R' Shalom Dovber Schneersohn (the then Lubavitcher Rebbe) commented, upon his departure, that this number represents the numerical value of the word יסוד (foundation, basis) plus the 22 letters of the Hebrew alphabet, symbolizing the idea that "Lubavitch, during these 102 years, built a strong foundation with the 22 letters."
Nusach S'farad says psalm 27 102 times a year as part of the prayer services: during shacharis and mincha daily from 1 Elul through Sh'mini Atzeres.
I'm told Nusach Haari also says it 102 times: at shacharis and mincha from 30 Av through Hosha'na Raba.