These unprocessed collections include: Accelerator Department records of Greg Loew and the Microwave Lab; BaBar experiment records of Michael Kelsey (drift chamber logs), Blair N. Ratcliff, Bob Messner, and Dave Aston; Bubble Chamber Group films and data tapes; Experimental Group B, including records of David Aston; Experimental Group E; Group A data tapes; Group A records of Herbert (Hobey) DeStaebler; SLAC-E-142; Group B Bubble chamber experimental film; Group B E-135 LASS spectrometer experiment data tapes; Group C, including Harvey Lynch records and Mark II collaboration; Jim McDonald papers; Millicharged Particle Search (mQ); R. F. Mozley E-104 bubble chamber films; Next Linear Collider Test Accelerator (NLCTA) records; Jim Stanfield's (Positron-Electron Project) PEP II design; PEP-4/TPC records; Alan Hill PEP II records, Longitudinal Feedback (LFB), Next Linear Collider (NLC), Stanford Linear Collider (SLC), & RF publications; Stuart Metcalfe PEP II design records; Robert Phillips correspondence and papers on Ubitron research; Edward Garwin records on Physical Electronics (PEL); RF Accelerator Research & Engineering Division (RFARED) records of Mary Regan; SLAC Computing Services (SCS) records of Les Cottrell, Charles Granieri, John Halperin, Joseph Perl, and Charles Boeheim; SLAC Large Detector (SLD) records, including those of Marty Breidenbach, Philip Burrows, and Philip Seward; Scientific Computing and Computing Services (SCCS) data tapes; Single Pass Collider notes and PEP notes; Technical Information Services (TIS) technical publications and department records; Elliott Bloom records; Martin Breidenbach records; Experimental Facilities Department records; Gary Godfrey records; Group D experiment 09 data; Group SLC and Group SLD records; International Linear Collider (ILC) / NLC records; Vera Luth records; Mark II collaboration records and data tapes; Accelerator Research Division records of Nan Phinney; SLAC Summer Institute (SSI); SLC / MCC data tapes; SLD or Mark III data tapes; Stanford Positron Electron Accelerating Ring (SPEAR) records of John Voss; Terry Schalk records; Alex Burke records regarding klystrons, magnets, and microwave research; Linac Coherent Light Source (LCLS) records of Hank Deruyter, including records on mod "A" couplers; E-103 bubble chamber film rolls of Robert S. Panvini; Bubble chamber film rolls from unknown experiment.