I'm unsure of the respectability of A Level Computing, seeing as how it is not a widely available subject. I have not seen it on any blacklist, yet I have not seen it being on a list for general or limited suitability.
Computer Science, which I assume is Computing, is listed as useful (or preferred for St. John's) on the Cambridge course requirements for Computer Science, however.
Does anyone have any idea about it's general respectability, mainly out of curiosity?