▁U CLA ▁David ▁Ge ffen ▁School ▁of ▁Medicine , ▁and ▁University ▁of ▁Arizona ▁College ▁of ▁Medicine . ▁ ▁References ▁ ▁External ▁links ▁ ▁official ▁website ▁ ▁Category : So ftware ▁companies ▁of ▁the ▁United ▁States ▁Category : He alth ▁information ▁technology ▁companies ▁Category : So ftware ▁companies ▁based ▁in ▁New ▁York ▁City <0x0A> </s> ▁S 1 ▁MP 3 ▁players ▁are ▁a ▁type ▁of ▁digital ▁audio ▁players ▁based ▁on ▁many ▁different ▁kinds ▁of ▁ch ips ets . ▁ ▁The ▁popular ▁ones ▁include ▁A ctions ▁and ▁AL i ▁ch ips ets . ▁ ▁They ▁are ▁sold ▁under ▁do z ens ▁of ▁different ▁other ▁brand ▁names ▁and ▁in ▁a ▁variety ▁of ▁case ▁designs . ▁The ▁players ▁were ▁very ▁w ides p read ▁around ▁ 2 0 0 5 – 2 0 0 6 ▁and ▁have ▁since ▁been ▁su pers eded ▁by ▁more ▁advanced ▁models . ▁ ▁Cap abilities ▁▁ ▁MP 1 , ▁MP 2 , ▁MP 3 ▁and ▁W MA ▁play back ▁ ▁W MA ▁DR M ▁support ▁on ▁a ▁small ▁number ▁of ▁models ▁ ▁O gg ▁Vor bis ▁support ▁on ▁a ▁small ▁number ▁of ▁models ▁mostly ▁made ▁after ▁ 2 0 0 5 , ▁though ▁this ▁is ▁not ▁typically ▁listed ▁on ▁the ▁player ' s ▁pack aging ▁and ▁may ▁come ▁with ▁draw back s ▁( such ▁as ▁lower ▁maximum ▁volume , ▁decre ased ▁battery ▁life ▁or ▁an ▁in ability ▁to ▁read ▁ID ▁tags ). ▁ ▁Act s ▁as ▁a ▁USB ▁flash ▁drive ▁when ▁connected ▁to ▁a ▁computer , ▁and ▁works ▁without ▁battery ▁charge ▁when ▁connected