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.
If the CD/DVD drive of your computer cannot read discs, make sure that the device is listed in Device Manager. To check that the drive is in Device Manager, follow these steps: On the Windows 8 Start screen, type Device manager to open the Search charm, and then select Device Manager from the search results list.ake sure the disc type is compatible with both the computer burning the disc and the computer playing the disc (CD-R, DVD+R, etc...) See the HP support document Choosing Compatible Media for Your Optical Drive. Make sure the disc burning session was closed after the disc was finished.