Sketchpad in Squeak

Jimmie Houchin jhouchin at texoma.net
Sat Jun 14 22:36:12 UTC 2003


Unfortunately commerce and laws formed for such aren't as open and 
friendly as Scientist may like.

With all the extensions and such added by Congress it is my 
understanding that any after 1923 can have a copyright period of up to 
95 years.

 From 1923 to 1963 the copyright holder had the opportunity to renew and 
extend copyrights. From 1964 on the copyrights renew automatically.

It is up to the copyright holder to either place the materials under the 
public domain or to explicitly permit copying with whatever restrictions 
they place until such periods expire.

For a simple chart of copyright terms.

http://www.unc.edu/~unclng/public-d.htm

This from my research. I am working on some harvesting of out of 
copyright materials, which is how I was told of this web page.

Might better get permission for these items.

Hope this helps.

Jimmie Houchin



Alan Kay wrote:
> Well, the thing is 40 years old, and I would presume that copyright has 
> already run out. But perhaps we should check. In any case, the Early 
> History chapter is fine since it was the original doc I wrote for SIGPLAN.
> 
> Cheers,
> 
> Alan
> 
> At 1:26 PM -0400 6/14/03, Brent Vukmer wrote:
> 
>> Thanks, Alan!
>> Doesn't the MIT copyright forbid redistribution, though?  On the page
>> that Ned pointed to, it says:
>>
>> "Copyright Notice
>> M.I.T. Theses are protected by copyright. The images may be viewed from
>> this source for any purpose, but reproduction or distribution in any
>> format is prohibited without written permission. Inquiries about
>> permission may be directed to:
>>
>> Permissions Manager, MIT Document Services
>> 77 Massachusetts Avenue, Room 14-0551,
>> Cambridge, MA 02139 USA
>> E-mail: <docs at mit.edu>"
>>
>>>  -----Original Message-----
>>>  From: Alan Kay [mailto:Alan.Kay at squeakland.org]
>>>  Sent: Saturday, June 14, 2003 1:27 PM
>>>  To: The general-purpose Squeak developers list
>>>  Subject: RE: Sketchpad in Squeak
>>>
>>>
>>>  I've put pdf files of the Sketchpad thesis and the Early
>>>  History chapter at:
>>>
>>>  http://www.squeakalpha.org/~sqftp/Sketchpad.pdf.zip     about 10MB




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