This seminar synopsis outlines a presentation comparing personal computers, mainframes, and supercomputers. The presentation will cover the introduction of these systems along with their configurations. It will compare personal computers, mainframes, and supercomputers at both the software and hardware levels. Examples that will be discussed include the supercomputing facility at Panjab University and how supercomputers are used for weather forecasting in Australia. The goal is to highlight the power of personal computing and bring attention to the abilities of mainframes and supercomputers.