Syslinux - Jan 2017 - A UEFI

Examples for a correct use of "a" / "an":

* A Unix command
* An upper-case letter
* An umbrella
* Just some few dollars an hour
* A "hungry" man, always playing to win
* A united community
* An ample evidence
* A unified standard

And so:

* A UEFI implementation

Have a prosperous year,
Ady.