While you can figure it out from the completion system, this isn't the most obvious method.
Almost all programs installed by pacakges are in
/usr/bin, so you can list the programs in
/usr/bin whose name ends with
You can list the files by inode change time. The modification time of an installed program is usually the time it was compiled, because archiving and installation tools copy the modification time alongside the data. But the inode change time of a file is the last time anything happened to it, including being extracted or copied (in fact, it's having its modification time changed that resets the inode change time). Since you installed the program recently, it's one of the last ones shown by the following command:
ls -lctr /usr/bin/*top
r option if you want to start looking from the top rather than from the bottom.
You could also look at the log of programs you installed. They're in