I work in IT for 20 years.  Being a woman in the IT field, I definitely can feel the discrimination.  First thing about salary, it does not matter I can do a good job or even a better job than my male co-workers, their salary are higher.  (Don't argue with me, I check that with my friends at HR, even it is confidential, my friends will not say how much those people earn but agree the company pay more to the man developers even my experience and skill is high than them.)

Second, in all the companies I worked for, in the IT department it always consisted more men than women, about 7 to 3 ratio.  In 4 companies, I was the only female.  When promotion times came, it did not matter if I did a good job or not, my name was always at the bottom.  Especially when my son was an infant, that company told me that was the reason they could not promote me because I was not as flexible as the other developers because I had to leave work at 5 to pick up my son at daycare.

IT is very competitive, the technology changes all the time.  Men may have all the time to study the new technology, but for me when I get home, I start my second job as the maid (cooking, cleaning...)  I try to keep up and try to read a lot of books, but by 10:30pm, I am dead tired after working 2 jobs.

This is my experiences.