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Dropping a Dynabook: A comic that turned from Science Fiction to Science Fact

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Some time around 1982, I saw an amazing comic on the wall of a Xerox Alto computer room at the MIT AI Lab. Given the subject matter, I assume the comic was originally created at Xerox PARC, possibly as part of the NoteTaker project, but can't find any trace of it on the web. I have recreated it from memory, below.
The comic is explaining the events that happen when a Dynabook is accidentally dropped off the top of Half Dome in Yosemite National Park. Note that a free-fall calculator claims that it would take over 12 seconds for the Dynabook to hit the Yosemite Valley floor.
T+00.000 Dynabook accidentally dropped from top of Half Dome.

T+00.016 Dynabook notices that
It can't sense its user.It is in zero gravity.There is a 200 MPH wind from below. Dynabook concludes that it is falling.
Turns off the display to save memory. Opens a radio connection to El Capitan radio tower.Begins backing up the user's recent changes.
T+05.000 Dynabook hits a glancing blow to the side of Half …

Pro No Mo - I don't really need a MacBook Pro machine for hobby programming.

I've been trying to decide which Apple laptop to buy for hobby programming.

I'm leaning towards the cheapest laptop Apple sells, the 2019 MacBook Air. As far as I can tell, is  fine for my current needs.

I specced out a more powerful and future-proof laptop, a 2019 MacBook Pro with 2x the RAM and SSD storage, but it was 60% more expensive.

I think it makes more sense for me to buy the cheaper laptop today, and plan on replacing it sooner. Especially because I have a lot of family members who would be fine with the cheaper laptop as a hand-me-down.

It does feel a little weird to decide that I don't need a "Pro" machine. When it comes down to it, Xcode, a SSD and a retina display are all the "Pro" I need for hobby programming, and Apple has made those features available in the budget Air line.


The way I solved my daughter's "iMessage Activation" error

Writing these notes in case they help someone.

My daughter recently tried to add her Apple ID to her iPhone'sApple Messages app. (Settings > Messages > Send & Receive > Add Apple ID)

When she tried this, she got a dialog box where she could type in her Apple ID and password. After a 15 second delay she got an error dialog box:

iMessage Activation
  An error occurred during activation.
        Try again

She got a similar error message if she tried to activate FaceTime:

FaceTime Activation
  An error occurred during activation.
        Try again

I searched the Internet, and tried the various remedies that Apple and others suggested:

Reboot Phone.Make sure the phone can receive SMS messages.Enable/disable iMessage and FaceTime.Log the iPhone out of iCloud and log back in again.Visit icloud.com and check the iCloud account to see if there's any warnings or errors.Update the phone OS to the latest release version of iOS.Try to register with WiFi enabled but Cell disable…