Version 2 of this program, recently released, differs from Version 1 in several critical ways. The data-entry module has been entirely rewritten. Where version 1 required the user to enter data via a dialog box, version 2 allows the user to enter data directly into a spreadsheet. This interface is easier to navigate and also allows the user to cut-and-paste data from other programs such as Excel ®, SPSS ®, and STATA ®. Where Version 1 allowed the user to enter data in one of ten formats, Version 2 allows the user to enter data in more than 100 formats. Where Version 1 allowed the user to convert data into one of five indices of treatment effect, Version 2 features 20 indices, including some for one-armed studies and survival studies. Additionally, Version 2 allows the researcher to combine data from studies with (a) binary outcomes, (b) continuous outcomes, and (c) correlations, in the same analysis by converting effect sizes and variances when appropriate. It also allows the researcher to combine data from studies that used independent groups and studies that used paired groups, taking account of the standard errors in the different study designs. Finally, this version adds new computational options such as one-way analysis of variance using mixed models, a module for publication bias, cumulative analyses, and numerous other features.