You want to tailor a resume like this. Indeed don't mention essentially obsolete things like DOS or AIX unless they help you get the job you're applying for. I don't mention that stuff at all now.
"Reason for leaving" isn't necessary.
I also like to see metrics. "I did X, Y and Z and we got Q fewer support calls" or something like that.
I'd also like to see some evidence of teamwork ("worked with Frobozz group and got Z shipped with important feature F").
You want to tailor a resume like this. Indeed don't mention essentially obsolete things like DOS or AIX unless they help you get the job you're applying for. I don't mention that stuff at all now.
"Reason for leaving" isn't necessary.
I also like to see metrics. "I did X, Y and Z and we got Q fewer support calls" or something like that.
I'd also like to see some evidence of teamwork ("worked with Frobozz group and got Z shipped with important feature F").