[tlug] Vendor lock-in vs monopoly

[Nguyen Vu Hung <vu-hung@example.com>]

In a speech of RMS[1], he said that "proprietary program is a monopoly"
but I think "monopoly" is not the perfect word here, and "vendor
lock-in" fits better.

For example, MS Word is a product of MS, it is not the only choice users
can make, for example Start Office.

Can anyone makes this clear?

TIA

[1]
  "Support for a proprietary program is a monopoly, because only the
developer has the source code, so only the developer can make any
change."
  "But when it's a choice between proprietary software products, yes
there're monopoly, because the user who chooses this product, then
falls into this monopoly for support, but if the user chooses this
product, he falls into this monopoly for support. So really it's a
choice between monopolies, and the only way to escape from monopolies
is to escape from proprietary software, to escape to the free world."
http://en.wikisource.org/wiki/Free_Software_and_Beyond:_Human_Rights_in_the_Use_of_Software_and_Other_Published_Works