For some sections, your alias has been listed as a 5 letter code. This will be the last 4 digits of some ID, plus a character. For example, if your last 4 digits were 2345, it will be posted as 2w345. The letter 'w' was picked at random. We will change those to real aliases as soon as possible.
H are homework grades.
H1 refers to Homework 1. H2 refers to Homework 2, and so forth. All homeworks are out of 100 points. Q are quiz grades. Q1 refers to Quiz 1.