Rpi Access Points

(1) Rpi Wireless Hotspot – elinux 2018aug
https://elinux.org/RPI-Wireless-Hotspot

(2) Setting up a Raspberry Pi as a Wireless Access Point
https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md

(3) How to use your Raspberry Pi as a wireless access point – Stephen Lovely 2017july

How to use your Raspberry Pi as a wireless access point

(4) Setting up a Raspberry Pi 3 as an Access Point – Shawn Hymel
https://learn.sparkfun.com/tutorials/setting-up-a-raspberry-pi-3-as-an-access-point/all