Difference between a device driver and module?

Solution 1:

A module is just a bunch of code that can be loaded into Linux. Note that this terminology is specific to Linux; windows typically calls everything a driver, I believe.

In Linux, frequently modules will be device drivers - that is, software that drives some specific piece of hardware (device). Likewise, on Windows, many drivers will be device drivers. However there are drivers and modules that don't drive hardware - for example, some Linux systems may have IPv6 support as a loadable module. Or filesystems such as ISO9660 may be drivers or modules.