Precision and accuracy are completely different concepts. Let's explore what they really mean, and how to tell the difference. 1  Resolution is the fineness to which an instrument can be read.  Precision is the fineness to which an instrument can be read repeatably and reliably.
1980s & 90s-High Performance Plastics. 1980 - First production of linear low density polyethylene. 1980 - First Blue HDPE pressure pipes for potable water introduced into UK. 1982 - First artificial heart made mainly of polyurethane, introduced implanted in a human.
Page 2 of 2. The plastic bags are so inexpensive that in the stores no one treats them as worth anything they use two, three, or four when one would do just as well, he said. First introduced in the 1970s, plastic bags now account for four out of every five bags handed out at the grocery store.