ages : ▁ ▁Ley ▁tunnel ▁ ▁Pri est ▁hole ▁ ▁Sm ugg ling ▁tunnel ▁ ▁T unn els ▁in ▁popular ▁culture ▁ ▁Notes ▁▁ ▁( 2 7 ▁January ▁ 2 0 0 6 ) ▁" D rug ▁ha ul ▁in ▁secret ▁border ▁tunnel " ▁at ▁BBC ▁News . ▁ ▁Access ed ▁ 2 8 ▁January ▁ 2 0 0 6 . ▁▁ ▁( 1 9 ▁June ▁ 2 0 0 3 ) ▁" M yst ery ▁at ▁the ▁monaster y ▁ends ▁as ▁C CT V ▁reve als ▁chamber ▁of ▁secre ts ' ▁d aring ▁th ief " ▁at ▁The ▁Guardian . ▁ ▁Access ed ▁ 3 0 ▁January ▁ 2 0 0 6 . ▁ ▁References ▁ ▁Category : Types ▁of ▁secret ▁places ▁Category : Do ors ▁Category : Ro oms ▁Category : De ception <0x0A> </s> ▁Object ive - C ▁is ▁a ▁general - pur pose , ▁object - orient ed ▁programming ▁language ▁that ▁adds ▁Small t alk - style ▁mess aging ▁to ▁the ▁C ▁programming ▁language . ▁It ▁was ▁the ▁main ▁programming ▁language ▁supported ▁by ▁Apple ▁for ▁mac OS , ▁iOS , ▁and ▁their ▁respective ▁application ▁programming ▁interfaces ▁( API s ), ▁C ocoa ▁and ▁C ocoa ▁Touch , ▁until ▁the ▁introduction ▁of ▁Swift ▁in ▁ 2 0 1 4 . ▁ ▁The ▁language ▁was ▁originally ▁developed ▁in ▁the ▁early ▁ 1 9 8 0 s . ▁It ▁was ▁later ▁selected ▁as ▁the ▁main ▁language ▁used ▁by ▁Ne XT ▁for ▁its ▁Ne XT ST EP ▁operating ▁system , ▁from ▁which ▁mac