Assertion: bbs | /r/HasProperty | designated via the use of special software
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text: a Bulletin Board System was a computer system designated (via the use of special software) as a 'message board/download center/social hub', and equipped with a device called a 'modem' (modulator/demodulator) that allowed a computer likewise equipped with a modem to 'dial up' and connect to the BBS over analog phone line.