Flood, recommend me a new laptop

Here's my situation: My former laptop, a shitty HP previously used by my dad that was bought around 6-7 years ago, finally died on me about a month ago. My parents have agreed to help me buy a new one for college in the fall and have given me $700. I am majoring in environmental engineering, so it'll have to be capable of running various engineering programs. I appreciate the help, because I honestly don't know much about computers, and I don't want to end up with a bad investment.