As the reader will quickly discover, this article is a short survey - from my personal
perspective - of 32 years of research, teaching on the modeling, analysis, and applications
of queueing systems. My choice of topics is far from exhaustive; I have
focused on those research achievements that I believe have been some of the most
significant in their contributions to queueing theory and to its applications. They
are the contributions that I have admired and appreciated the most over the course
of my teaching and research activities. Another author would undoubtedly have
made different choices, as they did in several survey papers on queueing theory.
The selection has not been easy at all since there are so many nice results.