Performance A I believe used to be the term used by the UK CAA to mean aeroplanes that could fulfil a specific climb performance with an engine failure at V1.
It's now referred to as JAR 25 and the equivalent in the FAAs is FAR 25. Australia's equivalent is CAO 20.7.1b.
I believe you cannot study for Perf A any more, it's now incorporated into the wonderful ATPL exams.
