In this week's episode of Programming By Stealth, Bart Busschots takes us through the last bit of the Utilities for Bootstrap 4. We'l refer to the WABAC Machine (kids, ask your parents about Sherman and Mr. Peabody) to installments 8 and 9 comparing positioning with CSS vs. Bootstrap. Thenwe'll learn about sizes and float utilities, Flexbox utilities, and Screen Reader utilities. It's great fun and of course Bart has his excellent companion tutorial at bartbusschots.ie/... and you can find Dorothy's awesome index of all things Programming By Stealth at podfeet.com/blog/pbs-index.