Technology Timeline

Technology Level in new Diasporia is based upon a sliding scale. The most advanced Tech Level is always TL A. As new technology is discovered and widely distributed older technology slips to lower levels.
Worlds that tend to advance with the general level of advancement of technology, those on the Major Routes, maintain their TL A status. Those that stagnate slip to a lower TL. So as the timeline advances those worlds at the cusp of technological innovation remain at the highest TL
We can start our technology time-line in 1951. This is the approximate year when the first experimental power producing nuclear power plant was placed in commission. With the invention of the jet aircraft in the previous decade and the large scale electrical distribution network perfected in the decade before that Technology at this TL reached its peak.
The Progressive Era, with its great advancement in electronics, cybernetics and power producing technologies, nonetheless failed to produce stable technological advancement due to the economic chaos which resulted in the loss of much of this technology as humanity lost significant advances in space and physics technology due to an inability to afford the supporting superstructure and the move down many technological dead ends such as embryonic stem cell research and "sustainable" technologies.
Coming out of the Progressive Era a full fledged technological revolution finally blossomed with the perfection of fusion power during the second decade of the twenty-second century. This Tech Level marks the wide distribution of cheap power. Combined with the moral push back it opened the way for the renewed push of ethical research.
By the middle of the twenty-second century great enough leaps in medical and cybernetic technology has been made to push the Tech Level yet again.
The advancement in gravity theory by the beginning of the Twenty-Third Century results in a jump to another Tech Level with the invention of the  Barnes-Gutierrez hyperspace engine, followed quickly by associated gravity control technologies. This results in the start of the diaspora.
In less that two decades Hyperdrills make the Subspace Highways possible, along with the associated Hypercable communication system, causing another Tech Level jump.
Another three decades see the perfection of the transmat portal, a technology predicted as early as two previous Tech Levels, but unrealized until 2257. Along with force field technology, another spin off of gravity physics this pushes the technology level.
Public and Church acceptance of nanotech utilization, as well as active terraforming of worlds establishes another technology level jump thirty years before the present.
The past thirty years have seen advancements in the utilization of nanotech, the wide spread use of terraforming and the proliferation of transmat technology.
The diaspora of humanity has resulted in a slowing of the the propagation of technology, if not the advancement of it. Since most advancement is accomplished on the advanced, high population worlds of the Highland almost inevitably the worlds in the Wilds, which are both remote from the research centers in distance and decades away in time lag several tech levels behind.