Yammer Yammer https://domybooks.ie/wp-content/themes/fildisi/images/empty/thumbnail.jpg 150 150 Ralph Smith Ralph Smith https://domybooks.ie/wp-content/litespeed/avatar/ad494069700639752e96280581821c2f.jpg?ver=1734465094 October 19, 2010 October 19, 2010 Philip Fierlinger, Xero – Yammer (2:44)