cl O O , ▁inc r ▁T cl ▁was ▁updated ▁to ▁use ▁T cl O O ▁as ▁its ▁foundation . ▁ ▁Web ▁application ▁development ▁ ▁T cl ▁Web ▁Server ▁is ▁a ▁pure - T cl ▁implementation ▁of ▁an ▁HTTP ▁protocol ▁server . ▁It ▁runs ▁as ▁a ▁script ▁on ▁top ▁of ▁a ▁van illa ▁T cl ▁interpreter . ▁▁ ▁Apache ▁Riv et ▁is ▁an ▁open ▁source ▁programming ▁system ▁for ▁Apache ▁HTTP ▁Server ▁that ▁allows ▁developers ▁to ▁use ▁T cl ▁as ▁a ▁script ing ▁language ▁for ▁creating ▁dynamic ▁web ▁applications . ▁Riv et ▁is ▁similar ▁to ▁PHP , ▁ASP , ▁and ▁J SP . ▁Riv et ▁was ▁primarily ▁developed ▁by ▁Dam on ▁Court ney , ▁David ▁Wel ton , ▁Mass imo ▁Mang hi , ▁Har ald ▁O e hl mann ▁and ▁Karl ▁Le hen b auer . ▁Riv et ▁can ▁use ▁any ▁of ▁the ▁thousands ▁of ▁public ly ▁available ▁T cl ▁packages ▁that ▁offer ▁count less ▁features ▁such ▁as ▁database ▁interaction ▁( O racle , ▁Post gre SQL , ▁MySQL , ▁SQLite , ▁etc .), ▁or ▁interfaces ▁to ▁popular ▁applications ▁such ▁as ▁the ▁G D ▁Graphics ▁Library . ▁ ▁Inter f acing ▁with ▁other ▁languages ▁ ▁T cl ▁interfaces ▁n atively ▁with ▁the ▁C ▁language . ▁This ▁is ▁because ▁it ▁was ▁originally ▁written ▁to ▁be ▁a ▁framework ▁for ▁providing ▁a ▁s ynt actic ▁front - end ▁to ▁commands ▁written ▁in ▁C , ▁and ▁all ▁commands ▁in ▁the ▁language ▁( including ▁things ▁that ▁might ▁otherwise ▁be ▁keywords , ▁such ▁as ▁if ▁or ▁while ) ▁are ▁implemented