The vocabulary is designed to deal with two distinct levels: 1. The 850 words sufficient for ordinary communications to idiomatic English. 2. By the addit

The vocabulary is designed to deal with two distinct levels: 1. The 850 words sufficient for ordinary communications to idiomatic English. 2. By the addition of 100 words required for general science, and 50 for any particular science I guess "revolution" would be one of the words in political science?