:20:02
In fact, I remember going to, uh job interviews,
:20:07
I, at various times, considered
just going out getting a job.
:20:11
And I'd gone to a job interview.
:20:13
And I was talking to one of the people,
:20:15
and I started asking them about what tools they used,
:20:18
and they said, "Gee, we used bison++!"
:20:21
and I said, "Oh, I am the author of bison++!"
:20:24
Free Software generally does have a copyright.
:20:30
It does have an owner.
:20:33
And it has a license.
:20:34
It is not public domain.
:20:37
If we put the software in the public domain,
:20:40
somebody else would be able to make
a little bit of changes
:20:44
and turn that into a proprietory software package,
:20:47
which means that
the users would be running our software,
:20:51
but they wouldn't have freedom to cooperate and share.
:20:55
To prevent that, we use a technique called "Copyleft".
:21:00
The idea of Copyleft is that
it's "Copyright" flipped over.
:21:05
And what we do is, we say,
:21:07
this software is copyrighted
:21:09
and we, the authors give you permission
to redistribute copies,
:21:15
we give you permission to change,
:21:17
we give you permission to add to it.
:21:19
But when you redistribute it,
:21:21
it has to be under these terms,
no more and no less.
:21:25
So that whoever gets it from you
:21:28
also gets the freedom to cooperate
with other people, if he wants to.
:21:35
And then, in this way everywhere the software goes,
:21:39
the freedom goes, too.
:21:41
And it becomes an inalienable right
:21:45
to cooperate with other people and form a community.
:21:48
[ And so, what is that? the license?
what was that... ]
:21:52
Well, Copyleft being a general idea,
:21:55
in order to use it, you have to have specific example.
:21:59
The specific example we use for
most GNU software packages