For A levels consider ICT and Graphic Communication (History is fun but useless to your carrier, R.E. is completely useless for any carrier unless you plan to work for one of the cults.) Or go right to college and skip the A levels i left High School at 16 for college and am currently in 4th year Uni with acceptance to MSc in September. I found this a more enjoyable experience than doing Higher's and Advanced Higher's in subject of no interest.
Why would you drop out of high school to go to college (only relevant discussion for Scotland's education system)?
All you need is generally 4 Highers to get into a University. If they are being especially picky, they'll ask for an Advanced Higher. But I got conditionals for Edinburgh University and Glasgow University for Computer Science BSc with Honours with only 4 Highers.
Dropping out of High School and going to college is not a good idea if you are wanting to go University. Stay on, get your Highers, and even do Advanced Highers if you wanted. Highers in Maths, English, Physics, Computing and Music are what I took.
Of course, the English education system is different, where college (or 6th form for some high schools) is where you do your A-levels (and AS-levels) to get into University.
I do agree that doing History and R.E is a bit of a waste of time if you are looking at computer based things.
Physics, Maths, English and Computing are good subjects. Physics and Maths are closely tied in with Computing, and English, well, you need to know how to write when you come to University. Uni's don't need you to have English, but I've got a few friends who didn't take English at high school and their dissertations look like they've been written by Micky Mouse.