Numbered 27512, this compact 97.8 KB PDF is listed as a schematic but names no brand, board or revision.

Listed under schematics, this 92.0 KB PDF has a purely numeric name, 27256, with no manufacturer or revision attached.

Named 2764a, this 99.2 KB PDF sits in the schematic category, with the trailing a likely marking a revised version of a 2764 part.

A 108 KB PDF stored as a schematic and titled 28F020, the part code of a 2 Mbit parallel flash memory in the 28F family.

A 293 KB PDF filed under schematics and titled 28F001, which belongs to the 28F flash memory family, usually a 1 Mbit boot block device.

English PDF on testing electronic components, filed under schematics but in practice a general reference rather than a circuit diagram for a particular board.

A 176 KB PDF catalogued as a schematic, named 28LV64, a part number from the low-voltage 64 Kbit parallel EEPROM family.

Named 28F102, this 116 KB PDF is filed as a schematic but the code points to a 28F-family parallel flash memory device rather than a board.

PDF of 97.3 KB listed as a schematic and named 28C512-513, covering two related parts from the 28C parallel EEPROM family in one document.

Datasheet in PDF for the IRFP1405, an N-channel power MOSFET in a TO-247 package. The file name gives only the part number, so take the voltage, current and…

Listed as a schematic, this 553 KB PDF named 29040a is most probably a datasheet revision for a 4 Mbit 29-series parallel flash part, the a suffix suggesting a later…

PDF filed as a schematic, named 28LV65, a code in the family of low-voltage parallel EEPROM memories.

Spanish-language course chapter on basic electronics, provided as an 817 KB PDF and apparently the same content as the numbered topic 2 of the series.

Schematic in PDF form for a parallel microphone preamplifier circuit, an audio design rather than a computer board.