I had an unusual friend. He was very useful to me and we made many fascinating discoveries together. Sometimes, though, he would wake up entirely backwards. On those days he would not work with me but instead with an accountant who found him very useful as well. The odd thing was that in the accountant's office, everyone insisted that my friend was short. When he worked with me, although he may have been in a technical sense short, we seldom thought of him that way. People generally regarded him as full sized, perhaps a bit informal. One day, my friend had a terrible accident and completely fell to pieces. I tried to put him back together but I must have gotten something wrong because instead of his old life he now lives in a church and hangs around the priest.
Can you identify my friend?