9 Portable electronic devices, namely, heads-up displays (HUDs) with on-board processing capabilities and integrated sensors; Portable electronic devices, namely, swimming goggles with on-board processing capabilities and integrated sensors; Computer software platforms for controlling and interacting with heads-up displays; Computer software and hardware and wearable sensors for recording, tracking and analyzing swimming performance data; Downloadable computer and mobile application software for recording, tracking and analyzing swimmer movements, and providing feedback and scoring on swimming technique and performance, and providing games and other user activities aimed at improving swimming technique and performance