Exchange Server was initially Microsoft's internal mail server. The first version of Exchange Server to be published outside Microsoft was Exchange Server 4.0. Exchange initially used the X.400 directory service but switched to Active Directory later. Versions 4.0 and 5.0 came bundled with an email client called Microsoft Exchange Client.
Definition of pareidolia in the English dictionary. The definition of pareidolia in the dictionary is the imagined perception of a pattern or meaning where it does not actually exist, as in considering the moon to have human features.
Parousia is a Greek word used 24 times in the New Testament to mean coming, arrival, personal presence. It is most often used to indicate the second coming and the arrival of the Son of Man though it can also indicate a visit by a Christian worker, apostle or even the man of lawlessness .