What is the BLAB_MEM environment variable in Windows?

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http://superuser.com – On my Windows Vista system I see an environment variable called BLAB_MEM, with the value "-Xms128M -Xmx512M". This variable name is shown under both the system and user variables. That value (-Xms128M -Xmx512M) looks like a set of arguments to a command line invocation of Java, but where did the BLAB_MEM variable name come from?? I've googled for BLAB_MEM but nothing relevant comes up, so I am turning to the super-duper SuperUser community. Here are some more details in case they might be relevant: The most recent software I've installed is the QSTK package for python, in connection with a (HowTos)