PDF for the 2N7000 with r3 in the name, most likely the third revision of the datasheet, 77.5 KB in size and filed under schematics. The 2N7000 is a widely used small-signal N-channel MOSFET. Since manufacturers update characteristic tables and package drawings between revisions, compare this edition with other copies if values disagree. Use the sheet to identify the gate, drain and source leads, read the maximum ratings, and confirm a proper substitute before soldering.
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.