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1. Compression reduces the amount of disk space required to store data.

2. As technology changed the world of mobile devices, the PDA (personal digital assistant) has become obsolete as devices like touch-screen smartphones and tablets grow in popularity.

3. The Internet has enriched our lives. It's difficult to imagine how we_did certain jobs before we had the ability go online.

4. In 1969 Intel designed the first microprocessor.