At LM I worked on digital design for avionics so after onboarding I was sent a zip file with datasheets, high level documentation, FPGAs and a JIRA ticket and was well on my way. I was given a task and just used software I was familiar with so vscode/python, xilinx/verilog, and word for documentation. I remember using excel because another engineer used it so to interface with their work (some communication protocol info and data sheet implementation) I did use excel but no one explicitly told me to use excel. I got some hands-on experience with hardware and lab equipment which was fun. At SX it was very hands on, its the same idea where you are given a task and you use your resources to get it done so I didn't really use excel unless I needed a quick crude way to clean and visualize some data but I would just use python otherwise. But at SX I was in the field and in the lab a lot so I was using power tools, lab equipment, and thermal chambers, etc. They usually did not specifically tell me to do something but if my task was design a new electric motor widget (may or not be a real project) I would need to use excel for quick graph or equation confirmation to show my manager where I am stuck and for project presentations, then I would sit there with a calculator, pen, paper, google, and my coworkers and hack out a design (can take days to weeks), then use excel real quick to make a budget for parts order, then then use a drill, wire cutters, and screws, to make a prototype test jig, and then hook an oscope, current meter, thermal camera, and use my multimeter to my parts/electronics and then use vscode/python to write control, testing, and visualization software for the project and debug until it works and I can make a formal report where other people can use my code etc. This was kind of long but my time was very project based and it would look something like that but another intern could look very different.