Gaydar

Within the LGBTQIA+  community there is often the assertion that  community members can tell other community members,  the terms used for this are often 'cute' puns that are based in technology / communictions  

These include the following  - most of  which are pretty much self explanatory.

Gaydar 

LiDAR

Transponder 

Bi-Fi

Bi-Focals

furSonar

Pantennae

Quantum Processing ( none Binary) 

 The concepts behind these is all pretty similar in that  there is an assumption that people  are able to pick up on the subtle and less subtle clues that mark someone out  as  having  these charaacteristics...  

As you will also see it appeals to the punning sense of  humour ...