README file for Data from: The A-B transition in superfluid 3He under confinement in a thin slab geometry Authors: Zhelev, Nikolay; Sebastian, Abhilash; Smith, Eric; Bennett, Robert; Rojas, Xavier; Levitin, Lev; Saunders, John; Parpia, Jeevak Author Contacts: 1. Nikolay Zhelev nizhelev@gmail.com, Current address: SP-PR-02-1 1 Riverfront Plaza, Corning, NY 14031 2. Jeevak Parpia, jmp9@cornell.edu, 510 Clark Hall, Cornell University, Ithaca, NY 14853 The summary of the experimentally observed transitions between the A and B superfluid phases in the experiment is compiled in 'ZhelevEtAl_SummaryOfRuns.xls'. The first spreadsheet tab of the Excel spreadsheet file summarizes the data for all pressures and is the source data for table 1 in the manuscript. The other spreadsheet tabs contain data at each experimental pressure listing the Cooling and Warming runs and the observed transitions between the A and B superfluid phases at that pressure. PDF prints of each spreadsheet tab are contained in the file 'ZhelevEtAl_SummaryOfRuns.zip', so that data is accessible without needing MS Excel. Figure 1 sources data from 'ZhelevEtAl_Fig1_DeflectionData.csv' Figure 2 sources data from 'ZhelevEtAl_Fig2_SuperfluidFractionData.csv' Figure 3 sources data from 'ZhelevEtAl_Fig3_DissipationData.csv' and 'ZhelevEtAl_Fig3_SuperfluidFractionData.csv' Figure 4 sources data from Table 1 of the manuscript Figure 5 sources data from 'ZhelevEtAl_Fig5_Turnarounds1p4barData.csv' Figure 6 sources data from 'ZhelevEtAl_SummaryOfRuns.xls' and also Table 1 of the manuscript. The data not from our experiment had been sourced from the following references Wiman, J.J. and Sauls, J.A., Strong-Coupling and the Stripe Phase of 3HE. J. Low Temp. Phys. 184 1054 (2016) and Levitin, L.V., Bennett, R.G., Casey, A., Cowan, B., Saunders, J., Drung, D., Schurig, Th., and Parpia, J.M., Phase Diagram of the Topological Superfluid 3He Confined in a Nanoscale Slab Geometry. Science, 340 841, (2013) A collection of all the figures in the manuscript is contained in 'ZhelevEtAl_NatureCommunications_Figures.zip'