Actually I made a decision to tweak the list a little when I'm done. I'm down to 10 titles, which shouldn't take too long with a few that don't have much in the way of variations.
I'm going to give the boxes a little more detail. I saw that many don't have "Made in" or "Printed in" written on my list. I'd like to give credit to the USA.

I see too much Made in China and need to be reminded that there was a time when many things in the US were actually made here. I made a joke the other day to my wife when we went to Chinatown in NY. We walked in a Chinese store and I picked up a few items and said to her, "look, everything is made in the USA". Of course they weren't, but it was funny to think the Chinese would sell US made stuff and we sell stuff made in China.
The other thing I'm going to note with the Atari made boxes is the standard flap vs glued flap. I've noted these on the ones I've seen, but I'm going to write in standard flap for all boxes that aren't glued. I'm doing this in case there are glued flap styles I don't know about. People looking at the list may think they have the listed box, when in fact they hold a variation. So if standard flap is pointed out, and they are holding a glued flap, they can contact me with the scan and I can add a legitimate variation.
When I'm done, I'm considering starting a new thread. 11 pages long, people may not bother looking at what I'm saying, and I'd like to put a list of stuff I need scans for. Also, I was going to ask for more information in general. Many times I'd like to know if there is a Rev written on the flap of a box, the size and pages of manuals, and other little tidbits. I wish I had access to everything so this list would be complete, but like John said some 13 or so years ago, this is a work that requires many to input. Also, once the Atari section is complete on my part, I'll be moving on to the Intellivision and Colecovision lists I'm creating. I began the Intellivision list a long time ago. Talk about variations. I didn't get too far, think maybe 5 or 6 titles, but I'm also doing overlays besides the carts, boxes, and manuals. It's a task that may seem time consuming, but the limited number of titles will help keep the project managable.
Anyway, it's been a thrill working on this list, and I hope many of you collectors can use it. It's great to be informed what's out there. Rom has done a great service with his site. Having all those other companies is great for those who'd like to expand. I'm trying to keep things limited to 99% of US released titles, even though there may be PAL versions on the list of those titles. If at some point in the future, maybe a few years down the road, the list seems complete and I'm bored, I may expand into some of the more popular foreign titles. But with no real access to foreign carts, I don't have a feel for going in that direction. Be back in a few.
Phil