The main alternative ecosystems are run by Apple and Google.
Valencia's André Gomes is the main alternative for that crucial left-side role.
The main alternative is VLC, which also runs on MacOS and Linux.
"The main alternative is going to be humans," Dr. Keeling said.
But the main alternative — loading losses onto investors holding government bonds — has its own drawbacks.
The main alternative source of illegal income, numbers betting, has been largely destroyed by legalisation.
The main alternative is to turn coal into gas before using it to generate electricity.
Banding is a less radical operation than the main alternative, the gastric bypass.
For most of its history as the main alternative to Conservative rule in the UK, Labour has disappointed.
The main alternative, the manual trimming of countless commercially worthless small-diameter trees, faces problems of its own.
"Opium is more drought resistant than wheat, the main alternative crop, and opium does not require road transportation," they write.
