Miniature Edison screw (MES, E10) very very small screw bulbs with a roughly 10mm diameter screw thread.
This is also a rare screw thread to find on light bulbs. It's most common uses are in torch bulbs, Christmas decorations, Christmas welcome bridges, Jewish Hanukkah Menorah or German Schwibbogen.
Small Edison screw (SES, E14) with a roughly 14mm diameter screw thread. This is the same lamp cap as commonly used in ceiling lights and table lights, although these small bulbs are not usually suitable for general lighting purposes.
These small bulbs are available in a variety of voltages and wattages to suit all common requirements. The 24v 3w version is especially popular at Christmas time as they are used in inflatable outdoor decorations.
MBC (minature bayonet) bulb also known as Ba9s as it is 9mm in diameter. This is also a rare bulb option with specific applications. Used in auto interior lighting including, glove box, license plate, map, dome, door, trunk/boot, gauges, courtesy, dashboard, instruments, and sidemarker lights.