I worked with Mike for a couple of years on Newton. I had tremendous respect for his breadth of understanding of systems, from transistors and batteries all the way up to user interaction. He was a hardware designer who really understood software, too; in my experience, that's rare.

We've lost another great engineer to cancer. This sucks.

My condolences to his family, friends and co-workers.

Does "digital content escrow for iTunes purchases" refer to Apple's grouping of multiple iTunes purchases into a single credit card transaction, as described here: http://qr.ae/T3uTd ?

It is a pity that there is nearly nothing (articles, words, videos) on the web about this excellent engineer.

Rest in peace, Mike will certainly be missed