I am an expert on Microsoft Access. On PHP and MySQL, I have more experience than expertise. For manipulating text files, Python is delightful; my attempts to use Python for web development are less so.
I'm still looking for the ultimate personal information manager. TiddlyWiki is way out in front. TiddlyWiki version 5 will extend this pre-eminence, I hope.
The man who sets out to carry a cat by its tail learns something that will always be useful and which will never grow dim or doubtful. -- Mark Twain
A rebuke goes deeper into a wise man than a hundred blows into a fool. -- Solomon