DER | |
abbr. | Designated Employer Representative; Distributed Energy Resource |
abbr. avia. | Derham, Papua New Guinea; designated engineering representative |
abbr. IT | Distinguished Encoding Rules; Internet security certificate |
abbr. mil. | Destroyer Escort Radar; Destroyer Escort, Radar Picket |
abbr. railw. | Dunn-Erwin Railway Corporation |
abbr. sport. | Defense Efficiency Ratio |