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.
The 8x Slimline DVD+/-RW Combo Drive from Dellâ¢ allows you to enjoy crystal clear color, picture and sound clarity of CDâs and DVDâs. This Combo drive can read/write CDs, and read DVDs effectively providing users with full optical read capability in a single device.