All the comments, about the skill levels in a particular field, are my own assumptions. They may also reflect my interest in that field.
[Excellent]
I have done at least one major project in this field and I have very good command on this field.
[Good]
I have developed many programs (or a minor project) in it and in this field I know better then the most.
[Enough]
Although I don't have much exposure of it but I have enough knowledge to work with it.
[Know]
I have done verry little in this but I know it and I can start working on it, after revising it.
[Learning]
I have elementary knowledge of it and it is in my learning agenda so soon I will know it.