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#1810: «Chat Systems»
[An Euler diagram with many circle like drawings for various chat systems is shown. Some circles overlapping others in complicated ways, others are single circles with no connections, but most are embedded into others. Inside the circles mainly the standard sticky figures like Cueball, Megan, Ponytail and Hairy are shown but there are also a few others.]

[The list of items and its intersections from left top to right bottom is:]
Skype - none, Email
Email - none, Skype, SMS, Slack, Hangouts, IRC, ICQ, iMessage, Signal, WhatsApp, Zephyr, FB Messenger, Instagram DM, BBM, Telegram, Twitter DM
SMS - none, Email, Slack, Hangouts, IRC, Snapchat, iMessage, Signal, WeChat, WhatsApp, Zephyr, FB Messenger, Instagram DM, Peach, BBM, Twitter DM
AIM - none
Slack - Email, SMS, Hangouts, IRC, Signal
Hangouts - Email, SMS, Slack, IRC, Signal
IRC - Email, SMS, Slack, Hangouts, Signal
Snapchat - SMS
ICQ - Email
iMessage - Email, SMS, Signal, FB Messenger
Signal - Email, SMS, Slack, Hangouts, IRC, iMessage, Zephyr, Instagram DM
WeChat - SMS
WhatsApp - Email, SMS
Zephyr - Email, SMS, Signal
FB Messenger - Email, SMS, iMessage
Instagram DM - Email, SMS, Signal
Peach - SMS
BBM - Email, SMS
Telegram - none, Email
Twitter DM - none, Email, SMS
The "chat" tab in an old Google Doc - none
Apache Request Log - none
Wall (Unix) - none
Wall (bathroom) - none

[Caption below the panel:]
I have a hard time keeping track of which contacts use which chat systems.

I'm one of the few Instagram users who connects solely through the Unix 'talk' gateway.