The model proved successful, as Erol's would sign up nearly 300,000 customers by early 1998.

If this model proves to be successful, it could cut into the business of other Internet providers and wireless phone companies.

This model also proved to be more efficient than his original piles, though it did not prove as popular.

These models, while novel in their day, ultimately proved unpopular.

Both models proved to be disasters and were taken off the market.

The model proved successful and the chain set about expanding its store portfolio.

This model proved to be problematic as it led to issues of food quality, procedures and image management.

This model proved popular and continued in production into the 21st century.

Perhaps, however, this model will once again prove appropriate.

The above two models has proved to be dead ends with respect to school social work.