From formulas and functions to charts, columns and rows, Excel boasts a large collection of useful, important features. Bring your questions to our Excel Computer Class Thursday, April 30 at 5:30 p.m. This free class will be held in the Tech Center at the main library in downtown Casper. Natrona County Public Library computer classes are offered on a first come, first served basis. Library staff will be on hand to provide assistance. For more information, call 577-READ or visit www.natronacountylibrary.org.