Mike Rosen has been using music notation software since the early 90s, when he got tired of singing from third-generation copies of poorly written mimeographs. He switched to Finale NotePad around 2002, then PrintMusic, and finally the full Finale. Back then, SPEBSQSA was still sending hand-written charts to the chapters. Mike submitted a rewritten chart to Joe Liles, and got back about three pages of corrections. He’s gotten better.