As the first technologies were those invented by our prehuman ancestors that enabled the evolution of modern humans, in my opinion the invention(s) that triggered the technology revolution was some kind of early food related technology, one that improved our ancestors diet suddenly. Most likely either a cooking technology based on control of an open fire or hunting related technology based on antler, bone, or stone tipped weapons.
The improved diet allowed our prehuman ancestors to evolve larger and larger brains, allowing them to invent more technologies and better technologies to replace old ones at increasing rapid rates. Eventually the brain became the very large brain of the modern human and modern humans "explosively" invent new technologies so fast that now they build on each other so rapidly it is effectively impossible to keep up with the latest technologies!
The steam engine was the main invention during the industrial revolution and the valve and plug board was the first for the electronics revolution followed by the invention and development of the transistor, microchip. and microprocessor.
Morse
the portable video recorder
Gunpowder - Tseng Kung-Liang made the formula publicly available in AD 1040.
our communication and our lives! and plus our technology
In Europe, the most influential invention from the 13th to 15th centuries was likely the Gutenberg printing press. It was invented around 1440 and revolutionized the dissemination of knowledge, greatly contributing to the Renaissance, the Reformation, and the scientific revolution.
The saddle
The cotton gin.
Morse
telegraph
the cotton gin
The CAREVEL
the invention of the cotton gin
It revolutionized the world. Planes linked up the whole world and allowed warfare technology to be developed. Great question by the way.
the portable video recorder
The compass. The ancient Chinese invented the compass and revolutionized maritime (ocean / water) navigation.
Revolutionized the means of communications through invention of telephone.
After the light bulb, the next major invention was the telephone by Alexander Graham Bell in 1876. This invention revolutionized communication and paved the way for further advancements in technology.