▁as ▁in . ▁ ▁A ▁M ead ▁door , ▁developed ▁by ▁S ▁M ead ▁of ▁Le ic ester , ▁sw ings ▁both ▁ways . ▁It ▁is ▁sus cept ible ▁to ▁forced ▁entry ▁due ▁to ▁its ▁design . ▁ ▁A ▁Dutch ▁door ▁or ▁stable ▁door ▁consists ▁of ▁two ▁hal ves . ▁The ▁top ▁half ▁oper ates ▁independently ▁from ▁the ▁bottom ▁half . ▁A ▁variant ▁exists ▁in ▁which ▁opening ▁the ▁top ▁part ▁separately ▁is ▁possible , ▁but ▁because ▁the ▁lower ▁part ▁has ▁a ▁lip ▁on ▁the ▁inside , ▁closing ▁the ▁top ▁part , ▁while ▁leaving ▁the ▁lower ▁part ▁open , ▁is ▁not . ▁ ▁A ▁garden ▁door ▁res emb les ▁a ▁French ▁window ▁( with ▁l ites ), ▁but ▁is ▁more ▁secure ▁because ▁only ▁one ▁door ▁is ▁oper able . ▁The ▁h inge ▁of ▁the ▁operating ▁door ▁is ▁next ▁to ▁the ▁adjacent ▁fixed ▁door ▁and ▁the ▁l atch ▁is ▁located ▁at ▁the ▁wall ▁opening ▁j amb ▁rather ▁than ▁between ▁the ▁two ▁doors ▁or ▁with ▁the ▁use ▁of ▁an ▁esp ag no lette ▁b olt . ▁ ▁Sl iding ▁doors ▁ ▁It ▁is ▁often ▁useful ▁to ▁have ▁doors ▁which ▁slide ▁along ▁tracks , ▁often ▁for ▁space ▁or ▁a est h etic ▁consider ations . ▁ ▁A ▁by pass ▁door ▁is ▁a ▁door ▁unit ▁that ▁has ▁two ▁or ▁more ▁sections . ▁The ▁doors ▁can ▁slide ▁in ▁either ▁direction ▁along ▁one ▁axis ▁on ▁parallel ▁overhead ▁tracks , ▁sl iding ▁past ▁each ▁other . ▁They ▁are ▁most ▁commonly ▁used ▁in ▁clos ets , ▁in ▁order ▁to ▁access ▁one ▁side