The files in this directory were updated in February 1998. the main changes are 1. 15 extra newforms and 16 curves were added at levels 3371, 4009, 4021, 4051, 4195, 4279, 4339, 4451, 4495 (1 extra newform, 2 isogenous curves), 4499, 4595, 4631 (2 extra newforms), 4799, 4961. These were omitted in error earlier, apparently because of a bug in the sparse linear algebra procedures I was using. This was discovered in November 1997 by R. Schulze-Pillot, who determined the existence of a curve of conductor 4799 whic was not in my earlier table. As a result, I reomputed the number of newforms for every level up to 5077, finding 15 more. As a result, some of the numbers of curves as listed in the 2nd edition of the Book need adjusting, as follows: N all r=0 r=1 r=2 r=3 3001-4000 *3837* *1665* (2006) (166) (0) 4001-5000 *3962* *1690* *2092* *180* (0) 1-5077 *17598* *8095* *8959* *603* (1) where *...* denotes a corrected number. 2. The extra computations required to both determine the "strong" curve in each class and also compute the degree of the modular parametrization deg(phi) have now reached 4500. So up to this point the name codes for the curves may be taken as final. I hope to reach 5077 within a few months. February 1998