Enterprise has already been answered but if you want to ensure you can always earn and live wherever you want, then LAMP stack is for you. Majority (or at least

Enterprise has already been answered but if you want to ensure you can always earn and live wherever you want, then LAMP stack is for you. Majority (or at least a plurality) of the internet runs on it and there is always a shit ton of maintenance work needed. You could freelance from a cabin in the mountains if you want and never run out of work.