The Portfolio Selection Solver software (PSSolver 1.0) is a specially designed software for portfolio selection. Instead of working at the project level of project management (which is what Schedule does), PSSolver works at the level of the Portfolio of projects. It allows the user to work with the three project management dimensions (time, cost and return) as well as their related uncertainties. It also accounts for having prerequired projects (which are projects that have to be selected as part of the portfolio before being able to select some specific project) as well as mutually exclusive projects (which are projects that cannot be selected both at the same time). There are also two other dimensions: risk and ranking. These dimensions are created and take into account the available basic dimensions data (time, cost and return as well as their uncertainties) to be created. Risk is how much weighted uncertainty each dimension has when compared to all other dimensions. Ranking is a specially designed construct. There is time ranking, cost ranking and return ranking. The time ranking is how good the time estimate for each project is when compared to the time estimates of all other projects in the portfolio. The cost ranking and the return ranking are similarly constructed, except that time and cost are dimensions that are better the lower they are and return is a dimension that is best the higher it is. The overall ranking estimation is the weighted average of the time ranking, the cost ranking and the return ranking. Ranking for a given project (its priority) is a value between 0% and 100%. Projects with a ranking between 0% and 33% are low priority projects (colored red). Projects with a ranking between 33% and 67% are medium priority projects (colored yellow). Finally, projects with a ranking between 67% and 100% are high priority projects (colored green). PSSolver allows the user to visually interact with the data and the corresponding calculations and select the portfolio as the user sees fit. It also incorporates a zero-one integer programming approximation that usually leads to the optimal portfolio selection (if such is possible, because in a portfolio selection process other criteria than the values given usually needs considering as well). You can download the manual of PSSolver 1.0 by clicking here. You can download the installation program for PSSolver 1.0 (PSSolver10Setup.exe) by clicking here. The source code is included. PSSolver 1.0 has been created using Delphi 7. You can download Delphi 7 by clicking here. The experiments that PSSolver 1.0 allows to carry out can be done using PSSExperiment 1.0, which you may install using the installation software (PSSExperiment10Setup.exe) by clicking here.