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.
1 If you are using a CD-RW disc verify the drive is a CD-ROM or CD-R drive is capable of reading the disc. 2  DVD recordable discs-If you have a recordable DVD that cannot be read make sure it is not a Generation 1 DVD drive and that it supports recordable DVD media.