No, it's HP Printer Command Language[1]; it's the 'native tongue' of things like HP LaserJets. It predates and is different from PS and PDF[2] and isn't an alternative for PDF in that you don't store documents 'in PCL'.

[1] https://developers.hp.com/hp-printer-command-languages-pcl [2] https://support.hp.com/us-en/document/c06242096