An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. All computer programs, excluding firmware, require an operating system to function.
Popular sports of Mexico. 1  Football (Soccer), boxing, basque pelota, basketball, baseball, rugby union, racquetball, tennis, golf, taekwondo, track and field.  Bull Fighting - involves one or more bulls which are being fought in a bullring.
Portugal has various sports activities, and below are the top five most popular Portuguese sports. Football. Football (aka Soccer in the U.S.) takes the top spot on the list of the most popular Portuguese sports. A good number of talented football players from Portugal are known worldwide.