EXHIBIT 2.4 AGREEMENT AND PLAN OF MERGER dated as of February 9, 2000Merger Agreement • February 22nd, 2000 • Aether Systems LLC • Services-computer integrated systems design • Delaware
INCISCENT, INC.Series a Preferred Stock Purchase Agreement • February 22nd, 2000 • Aether Systems LLC • Services-computer integrated systems design • Delaware
1 Exhibit 10.23 SERIES B PREFERRED STOCK PURCHASE AGREEMENT January 18, 2000 2 TABLE OF CONTENTSSeries B Preferred Stock Purchase Agreement • February 22nd, 2000 • Aether Systems LLC • Services-computer integrated systems design • Delaware
WITNESSETH:Development Agreement • February 22nd, 2000 • Aether Systems LLC • Services-computer integrated systems design • Maryland
Agreement BETWEEN NATIONAL DISCOUNT BROKERS CORPORATION ANDConfidentiality Agreement • February 22nd, 2000 • Aether Systems LLC • Services-computer integrated systems design • New York
RECITALSMaster Agreement • February 22nd, 2000 • Aether Systems LLC • Services-computer integrated systems design • California
