The voice is Alan Kay who lead the invention of the modern day Desktop computer / GUI. The system is probably a prototype of the Dynabook, a laptop / tablet for

The voice is Alan Kay who lead the invention of the modern day Desktop computer / GUI. The system is probably a prototype of the Dynabook, a laptop / tablet for children. The code is Smalltalk which Alan and team created while inventing Object Oriented programming. You can play with Squeak, which is the modern version of this system.