Eijkhout, Chow, and van de Geijn's "Introduction to High-Performance Scientific Computing, Chapter 1: Sequential Computer Architecture"
Study section 1.1 of Chapter 1 on pages 7-13 to learn about sequential or Von Neumann computer architecture. Computer architecture is the high level computer design comprising components which perform the functions of data storage, computations, data transfer, and control.
Click https://s3.amazonaws.com/saylordotorg-resources/wwwresources/site/textbookuploads/5345_scicompbook.pdf link to open resource.