[ale] list pkgs installed since os install?

[timtw at earthlink.net (Tim Watts)]

Hi,

Anyone know of a way to list all packages installed on a system (Kubuntu 8.10) 
since the OS was installed? It doesn't seem possible to do this based on the 
info apt keeps. Have I missed something?

I guess one approach would be to get the list of packages installed on the 
current system and then diff that with the list on the upgraded system. Hmm, 
not exactly what I want but it probably doesn't get much simpler than that, 
n'est pas?


-- 
Happiness is when what you think, what you say, and what you do are in 
harmony.
 -- Mahatma Gandhi