<pre> [[H_Frame_Bogie]] [[Handbrake]] [[Handing]] [[Headstock]] [[Headway]] [[High_Speed_Train_(HST)]] [[Horn_(1)]] [[Horn_(2)]] [[Horn_(3)]] [[Hose]] [[Hostler]] [[Hot_Box]] [[HSDPA High-Speed Downlink Packet Access]] [[HSUPA High-Speed Uplink Packet Access]] [[HSPA HSDPA and HSUPA combined]][[HSPA+[[HSPA Plus or HSPA Evolved]] [[Hunting]] </pre>