▁attachment ▁One ▁ 2 3 1 4 ▁High ▁Speed ▁Channel ▁- ▁this ▁feature ▁was ▁a ▁R P Q , ▁and ▁was ▁not ▁part ▁of ▁the ▁original ▁announ cement ▁ ▁Integr ated ▁Att ach ments ▁The ▁Model ▁ 2 5 ▁has ▁a ▁standard ▁attachment ▁for ▁connection ▁of ▁a ▁ 1 0 5 2 ▁Model ▁ 7 ▁console ▁printer - key board , ▁which ▁is ▁used ▁as ▁the ▁operator ▁console . ▁Option ally , ▁the ▁Model ▁ 2 5 ▁can ▁have ▁a ▁standard ▁System / 3 6 0 ▁I / O ▁channel , ▁that ▁can ▁be ▁either ▁a ▁byte - multi plex or ▁or ▁a ▁selector ▁channel . ▁ ▁For ▁the ▁most ▁commonly ▁used ▁peri pher als , ▁such ▁as ▁a ▁ 2 5 4 0 ▁or ▁ 2 5 6 0 ▁card ▁reader - p unch , ▁a ▁ 1 4 0 3 ▁printer , ▁or ▁ 2 3 1 1 ▁or ▁ 2 3 1 4 ▁disk ▁drives , ▁optional ▁internal ▁attach ments ▁are ▁provided . ▁ ▁These ▁attach ments ▁connect ▁directly ▁to ▁their ▁respective ▁peri pher als , ▁and ▁appear ▁to ▁the ▁operating ▁system ▁as ▁if ▁the ▁peri pher als ▁were ▁channel - att ached . ▁ ▁Most ▁unusual ▁about ▁the ▁ 3 6 0 / 2 5 ▁was ▁a ▁feature ▁somewhat ▁analog ous ▁to ▁the ▁IBM ▁System / 3 6 0 ▁Model ▁ 4 4 ' s ▁integrated ▁single ▁disk ▁storage ▁drive , ▁namely ▁an ▁integrated ▁attachment . ▁ ▁Comp at ibility ▁Fe atures ▁The ▁Model ▁ 2 5 ▁provides ▁an