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.
USB flash drives have become an easier way to store and transfer data than burning CDs and DVDs. USB flash drives are nearly infinitely re-writable, whereas most DVDs can only be written to a few times. The flash drives are also easier to carry around, without worry of scratching. In order to transfer the contents of the DVD to a USB flash drive, you can simply copy and paste between the two.