A 193 KB PDF for the 2SA950, catalogued as a schematic but carrying a JIS semiconductor designation. The 2SA prefix identifies a PNP bipolar transistor, so the content is almost certainly the device datasheet. The name gives no maker or revision. Use it to read collector-emitter voltage, collector current, gain classes and package pin order, which you need when choosing an equivalent or checking junctions with a multimeter in diode mode. It opens in any standard PDF viewer.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.