There are a lot of fountain pen terms thrown around on various forums and blogs. To save time, many times these popular terms are abbreviated, so here’s a guide to help you out!
| A4 | 8.25″ x 11.75″ Paper size |
| A5 | 5.75″ x 8.25″ Paper size |
| Aero | Aerometric filler |
| B | Broad |
| BB | Double broad, or Blue Black |
| BBB | Triple broad |
| BBK | Noodler’s Bad Belted Kingfisher |
| BP | Ballpoint pen |
| BSB | Noodler’s Baystate Blue |
| C | Course |
| C/C | Cartridge/Converter |
| Cart | Cartridge |
| CdA | Caran d’Ache |
| ED | Eyedropper |
| EF/XF | Extra Fine |
| Estie | Esterbrook |
| G/GSM | Grams per Square Meter (paper weight) |
| F | Fine |
| FM/MF | Fine Medium |
| FP | Fountain Pen |
| FPN | Fountain Pen Network |
| FS | For Sale |
| ID | Ink Drop |
| IMHO | In My Humble Opinion |
| IPG | Iridium Point Germany |
| L2K | Lamy 2000 |
| LE | Limited Edition |
| M | Medium |
| MB | Mont-Blanc |
| MP | Mechanical Pencil |
| MS | Music |
| Newbie/Noob | Fountain pen novice |
| NIB | New In Box |
| NM | Nevermind |
| NOS | New Old Stock |
| OB | Oblique Broad |
| OBB | Oblique Double Broad |
| OM | Oblique Medium |
| OP | Original Poster |
| P51 | Parker 51 |
| Pel | Pelikan |
| PO | Posting |
| PR | Private Reserve |
| R&K/RnK | Rohrer and Klingner |
| RB/RP | Rollerball Pen |
| ROTFL | Rolling On The Floor Laughing |
| SF | Soft Fine |
| SITB | Stuff/slime/sludge In The Bottle |
| SM | Soft Medium |
| SU | Signature (stub) |
| Vac | Vacumatic filler |
| VP | Pilot Vanishing Point |
| WM | Waterman |
| WTB | Want To Buy |
| WTS | Want To Sell |
| WTT | Want To Trade |
| XXF | Super Extra Fine |
| XXXF | Needlepoint |
| YMMV | Your Mileage May Vary |
| YOL | Yard-O-Led |
| Z | Zoom (multi-angled) nib |
