This study will evaluate whether short-term ARV therapy of abacavir sulfate, lamivudine, and zidovudine given during treatment of active TB will slow progression of HIV disease in TB patients with CD4 counts of at least 350 cells/mm3. The study will also assess the possible risks (e.g., drug toxicities and resistance) and benefits (e.g., more rapid clearance of mycobacterium tuberculosis and reduced TB relapse) of punctuated ARV therapy.