| Field | Writing |
| Went Obsolete | Slowly, beginning in the mid to early 1950s. Still useful today (so not completely obsolete), as some people DO still use fountain pens! |
| Made Obsolete By | Biros (ballpoint pens) |
| Knowledge Assumed | You need to understand the particulars of the filling mechanism on your pen. There were many, including lever, button, rod, vacumatic, piston, touchdown, snorkel, eyedropper, bulb, and aerometric fillers to name a few. |
| When useful | Whenever your fountain pen needs more ink. |
Here's a page with useful fountain pen filling instructions: http://www.pendemonium.com/filling.htm