1. Fluctuations of aggregate economic activity. 2.Cycles Expansion/Boom and Contraction/Recession. Peak and Trough: They are the turning Points of the business cycle. 3. Comovements of many macro variables over the business cycle.
Section 5: Using external media: CDs, DVDs and removable USB storage devices. â¢ dvd-r:until about 2005 the most common and portable format; cannot be erased or reused. â¢ dvd-rw:are-writable version of-rformat, similar to cdrw format CD discs.
Blu ray and dvd are both optical discs. Nearly identical in size, blu ray discs and dvdâs have remarkably different storage capacities. A single layer dvd disc can hold approximately 4.7 gigabytes of data while a single layer blu ray disc of basically the same size can hold approximately 27 gigabytes of data.