Ligature: What are They?

A long time ago (think: midevil times) ligatures were used to save space and increase writing speed. Scribes were scribblin as fast as they could and paper was expensive thus the typographic invention! Today ligatures are widely popular in advertisment.

Here is an example of the letter "f" and how it is combined with "i" and "l"

Name

What happed to the "i" when it is combined with "f"

What other letters could you combine with "f"
1. 2. 3.