In the days of railroad telegraphy, important locations on the railroads were usually abbreviated with brief codes or symbols. The tables below lists some Reading codes from September 26, 1948.
| Main Line, Philadelphia Division | |||
|---|---|---|---|
| GS | Reading Terminal | HS | Lynn |
| DI | Diamond | GV | Grove |
| JU | 16th Street Junction | WM | Warminster |
| WS | Wayne | NK | Ayres |
| WI | Wind | JG | Neshaminy |
| NX | Newtown Junction | WO | Wood |
| BO | Tabor Junction | CN | Trent |
| KI | Jenkin | MN | Cheltenham Junction |
| YM | Carmel | FA | Fox Chase |
| MA | Dale | MI | Spring Mill |
| LD | Land | CK | Conshohocken |
| LK | Link | DK | DeKalb Street, Norristown |
| FR | Forest | EL | Elm Street, Norristown |
| DY | Doylestown | ||
| Main Line, Reading Division | |||
|---|---|---|---|
| DK | DeKalb Street, Norristown | DK | DeKalb Street, Norristown |
| NS | Norristown Junction | NS | Norristown Junction |
| PW | PW Tower | PW | PW Tower |
| PK | Perkiomen Junction | PK | Perkiomen Junction |
| U | U Tower | U | U Tower |
| RF | Royersford | RF | Royersford |
| CG | Colebrookdale Junction | CG | Colebrookdale Junction |
| DG | DG Tower | DG | DG Tower |
| Perkiomen Division | |||
|---|---|---|---|
| OB | Oaks | PS | Pennsburg |
| CV | Collegeville | GV | East Greenville |
| GX | Graters Ford | PJ | Palm |
| SC | Schwenksville | Z | Zionsville |
| SD | Salford | RK | Dillinger |
| GR | Green Lane | JA | Emmaus Junction |
| HI | Red Hill | ||
| Notes: | |
|---|---|
| Although some telegraph codes are intuitive, others are not. There are sometimes amusing stories about the origins of various codes. For example: “YM” (Carmel) allegedly stands for “Yocum’s Mistake”. Apparently Mr. Yocum misread the plans and built YM tower on the inboard side of the curve (outbound from Phila) at Carmel, instead of on the outboard side (inbound to Phila)...visibility, therefore, was diminished. | |