. ▁Many ▁M FP s ▁now ▁include ▁L CD ▁screens ▁and ▁other ▁user ▁interface ▁a ids . ▁ ▁Gener ally , ▁A IO ▁and ▁SO HO ▁products ▁contain ▁simple ▁L CD ▁displays , ▁while ▁Office ▁M FP s ▁contain ▁advanced ▁L CD ▁pan els ▁res emb ling ▁a ▁custom ▁computer - like ▁user ▁interface ▁( some ▁M FP s ▁also ▁offer ▁optional ▁keyboard ▁and ▁mouse ▁attach ments ). ▁ ▁In ternal ▁architecture ▁ ▁Hard ware ▁ ▁M FP s , ▁like ▁most ▁external ▁peri pher als ▁that ▁are ▁capable ▁of ▁function ing ▁without ▁a ▁computer , ▁are ▁essentially ▁a ▁type ▁of ▁computer ▁themselves . ▁They ▁contain ▁memory , ▁one ▁or ▁more ▁process ors , ▁and ▁often ▁some ▁kind ▁of ▁local ▁storage , ▁such ▁as ▁a ▁hard ▁disk ▁drive ▁or ▁flash ▁memory . ▁As ▁mentioned ▁in ▁the ▁Types ▁of ▁M FP ▁section , ▁the ▁physical ▁print ▁engine ▁may ▁be ▁based ▁on ▁several ▁techn ologies , ▁however ▁most ▁larger ▁M FP s ▁are ▁an ▁evolution ▁of ▁a ▁digital ▁phot oc op ier . ▁ ▁Security ▁ ▁When ▁dispos ing ▁of ▁old ▁printer s ▁with ▁local ▁storage , ▁one ▁should ▁keep ▁in ▁mind ▁that ▁confident ial ▁documents ▁( print , ▁scan , ▁copy ▁jobs ) ▁are ▁potentially ▁still ▁un enc rypted ▁on ▁the ▁printer ' s ▁local ▁storage ▁and ▁can ▁be ▁und e leted . ▁C rypto - sh red ding ▁can ▁be ▁a ▁counter measure . ▁ ▁Software ▁ ▁M FP s ▁also ▁run ▁a ▁set ▁of ▁instructions ▁from ▁their ▁internal ▁storage , ▁which ▁is