Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by law enforcement and in Citizens Band (CB) radio transmissions
Radios in the 1930s were based on vacuum tubes powered by a small motor-generator called a dynamotor. The dynamotor took from 1/10 to 1/4 of a second to "spin up" to full power. Police officers were trained to push the microphone button, then pause briefly before speaking; however, sometimes they would forget to wait. Preceding each code with "ten-" gave the radio transmitter time to reach full power. An APCO Bulletin of January 1940 lists codes assigned as part of standardization(per wikipedia)
10-4 message received 10-20 what is your location 10-33 emergency
In popular culture, people might say "what's your 20?" . There are police scanner codes such as code
blue for a bus or cab in trouble and code red for alarm activated and code purple for gang activity.
If you combine Mars and Venus (male and female) symbols and add a horn you get the Symbol that Prince used. Venus/Mars = 33. He very much pushed the blurring of male and female lines agenda of today. There are lots of conspiracies on the truther sites that cover Prince's death and do a much better job than I can.
I will add a thought or two.
This is his 2010 album released in 2010. It looks like the Jupiter symbol was added to his name symbol. It could also be a 10 code for location. His tour for this album started in Denmark(66) and ended in France(47) for first leg of tour and Norway(33) to Belgian(33). He had a special stop to play Grand Prix(57 the age he died at) at United Arab Emirates(77). The final stop was in the Netherlands(42 chaldean). This seems to have been his last big tour. For all his independence, he seemed to be like any other artist of today, marked with numbers of the industry. He did a brief tour this year in New Zealand(42) and Australia(30) starting in Melbourne(42) called the Piano and a Microphone Tour. It was only in February(42). Freemason(42) As we all these celebrities deaths lately, I do not know if they are really dead or they have gone of to live somewhere else.