Detailed information on the Tektronix 4050 series on the internet is fairly limited to a couple of wiki pages and scattered collector websites.

The Tektronix 4051 Computer was the first of this series and was introduced in 1976, and used a Motorola 6800 microprocessor with 32KB of BASIC ROM and up to 32KB of DRAM.

I got the US Air Force to purchase a 4051 with a Tektronix 8002 Microprocessor Development System in 1977 so I could develop a 6800 based microcontroller to replace an analog computer - and eliminate the constant potentiometer adjustments needed to keep that analog computer calibrated.

This was my first experience with a personal computer - and I loved it and created many programs to completely automate many processes that required an expert to accomplish.

That system was expanded to include a 4907 File Manager 8 inch floppy disk storage system, and a large transparent rear-projected digitizing tablet.
I created a 4051 BASIC program to use that tablet to digitize high-speed film images to calculate trajectory and speed - allowing an untrained operator to perform the task instead of an expensive contractor.

When I left the air force, I printed hard copies of many of my programs on a Tektronix 4631 hard copy unit. Those copies are still readable today

In 2000, I purchased a 4052 with 4662 plotter and 4631 hard copy unit - I repaired the 4052, and got it working with the plotter and hard copy unit.
I used the plotter to digitize a Battlestar Galactica set of Viper spaceships - and wrote a program "Vipers" which displays a set of scaled 'Vipers on Patrol' on my 4052.

The next year, I purchased a 4054 from an EBAY auction for $7 - and drove 400 miles to pick it up as the seller said local pickup only.

I was able to fix that 4054, and purchased an upgrade kit and have upgraded it to a 4054A.

Most recently I have been recovering vintage Tektronix programs from original DC300 tapes (I now have almost 200 Tektronix tapes) and I created a Tektronix 4050 program repository on Github with over 300 recovered programs:

Here is a 4051 brochure image showing some of the features:

Here are some images from a 1984 Tektronix Catalog on the Tektronix 4050 series computers.

First, the original Tektronix 4051 - still in production for eight years from 1976 to 1984, and the price had dropped from the original 1976 catalog page introductory price of $6995 down to $4995 in the 1984 catalog.

The Tektronix 4051 computer was featured in the 1977 TV Series: Battlestar Galactica, as shown in this screenshot:

The 4051 computer used a Tektronix Direct View Storage Tube technology to achieve an industry leading 1024x780 graphics resolution.

In the 1970's digital memory was very expensive - $4550 to add 16KB of DRAM, so it would have cost $28,000 for 1024x768 monochrome graphics memory with DRAM!

Here is the Tektronix 1984 catalog page showing how Direct View Storage Tube Technology works: