The traveller universe: Technology.

Imagine everything we have now in the cozy early 21st century. Then add a few fantastic items, and a few steps backward.

• Medicine is performed with microsurgery and advanced pharmaceuticals. Infectious disease is not a danger...unless it's bioengineered.
• Strong taboos mean that getting cybernetic upgrades or biotech grafts are unknown technology. Somewhere, somebody knows about these things, or did, but they were a mad scientist and didn't last long outside their own Private Idaho (a small asteroid in the outer belt of the Glisten system).
• AIs and robotics have a similar taboo around them. Outside of table service and simple floor cleaning, people don't really like robotic workers, for two reasons: one, most planetary governments pursue policies of maximum employment, and two, the Imperiums' biggest threat, the Zhodani consulate, is a robot-friendly, telepathic-mind-control government. A branch of the Zhodani government is actually called the thought police.
• Imperial law forbids the enslavement of sentients. No one really devotes much time and money to creating AIs, as they're likely to have some legal problems if they were successful.

So, what is there, since we know what there isn't?

• Compact hot fusion. Buses and trains can and do run on fusion power plants.
• Contragravity devices, and artificial gravity aboard ship...these are very cheap, and so almost all personal transport (motorcycles, cars) are built on this principle, at least on high-tech worlds.
• Superconducting battery/capacitor cells. "Energy cells." Battery-operated devices use universal sizes, kept in place for at least a millenium.  Even cellular communicators have interchangeable batteries.
• Sensing technologies that we can logically expect. Chemsniffers, Biosniffers.  Densitometers are highly sensitive at mapping the interior of objects using gravity sensors. (probably uses the CG tech; though we have crude densitometers using radioisotopes.)
• Gauss (magnetic accelerator) weapons
• Laser weapons.  These were at one point standard issue to space crews (extrapolation), but have never been as damaging as similarly-sized gauss weaponry at the personal scale.
• Bullets are still pretty good for regular folks, and cheaper.
• Flying power armor suits: "Battledress."  Different interpretations of canon have these on almost every regular army trooper, sometimes only on imperial marines.
• 'Reactionless' Thrusters. These require power, and increase an object's inertia. Imagine a rocket that burns nothing. These are pretty much the cheapest way of moving something, and so are ubiquitous. Even on lower-tech worlds, these might be imported and installed in gasoline engine vehicles (unsupported in canon, but believable extrapolation).
• Nanomaterials have developed to the point that carbon fibers and thermal superconductivity are normal for military hardware; some efficiencies in manufacturing may be due to nanoassembly...but...things are still made in factories and sold by retail/mailorder, not asked for in from a household factory.
• Some biotechnology, however most of these advances (in agricultural production) have been made millenia ago, and the technologies are now open-sourced or sold as a service package (chemlawn). Folks are just as creeped out by the throught of putting a rebreather lamprey on their face as you are...so most people just wear masks when they have to.
• REALLY cheap computers, and a large market for specialized devices. IR 'shades,' about as light and expensive as a pair of Oakleys, are available. Brands exist that combine these with handheld cellular devices to lookup products...but a lot of people value their privacy.