If I were recasting the TL "scene", I would be tempted to separate tech into broad areas with early, middle and late periods.
* Early Period - principles just beginning to be applied (they were discovered at the end of the last period, but the TL wasn't sufficient to apply the knowledge yet.)
* Middle Period - principles are well understood, though many clever applications remain to be invented (for example, compare 1980's or even 90's computers to modern computers - same essential concepts, but very different devices.)
* Late Period - the principles have been exploited as completely as possible without further understanding of the universe. Research into the next Early period begins.
Age of Shaping (1-3) - capable of modifying the world through physical means
* Domesticating Animals
* Agriculture
* Making tools from stone
* Building simple "mound" and post-lintel structures (towards the end of the period)
Age of Chemistry (4-6) - mastery of chemical reactions and the beginnings of science and mathematics
* Earth's Bronze Age up until the end of the "Age of Muscle Power"
* Metallurgy
* Sophisticated textiles and food preservation/preparation
* Medicine
* Science/Mathematics, Writing, Money, Literature, Architecture
* Late in the period, Industrialization is possible (though some species aren't driven to industrialize)
Age of the Atom (7-9) - mastery sub-molecular forces and quantum physics
* Pretty much our TL for the last 60 years or so. I'd put us in the Late part of the period.
* Electricity (early electricity, electric devices, electronic devices and semiconductors)
* Radio waves, Relativity, Quantum Mechanics
* Computers, Nanotechnology (take that, Neal Stephenson - I'm not even giving the "Diamond Age" its own TL!

)
Age of the G.U.T. (10-12) (needs a better name) - mastery of the fundamental forces of nature
* Equivalent to Traveller TL-9 to TL-15
* Anti-gravity (early period)
* Jump Drives (J1 is early, J2-4 is middle, J5-6 is late, somewhat arbitrarily)
* Nuclear Dampeners, Meson guns, etc.
Age of Transcendance (13-15) - mastery over "all creation"
* Grandfather and his Children's "Fate"
* Creating universes, changing the "laws of nature"
* Artificial Consciousness, Galactic Intelligences, etc.
* Other stuff my puny "Age of the Atom" brain can't imagine