It is the abbreviation of a company that makes electronic components

They are: NS (National Semiconductor, abbreviation: National Semiconductor)

TI (Abbreviation of Texas Instruments) , the United States)

MAXIN (Maxin, the United States)

NXP (NXP, formed in 2006 by Philips, the Netherlands)

ST (Italy French Semiconductor was formed by the merger of Italy's SGS Microelectronics and France's Thomson Semiconductor)

I hope it can help you!