Exactly what I was saying.
Though... I'd also frown on contributing to companies contributing to
proprietary software development too. But not what I was saying.
First thing I'd avoid is those using digital restrictions (HP, Dell, Toshiba,
Sony, Apple, Lenovo/IBM are well known for this, most other companies appear
not to have implemented digital restrictions), and then those shipping with
primarily proprietary software (MS Windows, etc, most companies do this),
then those shipping with select components depending on proprietary software
(for instance GNU/Linux, but with non-free blobs required, pretty much
everybody... except ThinkPenguin, and the company which ships the Gluglug X60
laptop).