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.
Buy the burner, unless you want to burn DVD/CDs on the fly then you'll need both. Oct 9, 2013, 3:58 PM. Generally, a burner 'burns' optical discs as well as reads them. ROM for a drive means Read-only. A unit listed as say, CD-RW / DVD-ROM means it will read and write CDs, but only read DVDs. You need to look very closely at the published media formats supported.