If you are employed in any modern company there will be plenty of applications you need access to.
At the moment I have to remember 7 passwords for different systems just to be able to do my daily work. On top of that I have to access systems on several client's networks and I must admit that I can't keep up any more. All systems have different algoritms for what passwords they accept and they all have different timeschedules for when I have to change the passwords.
All the systems are created and configured with the best intensions but the sum of the systems is a security disaster. There is no system more secure than its weakest link, and I'm sad to say, thats me.
Every time its possible I tend to breach security policies by having passwords I can remember or writting the passwords down somewhere else.