在门外汉看来，其实，＂云＂的发展是要让信息需求utility 化， 公共事业化，就象多数私人和公司不自己发电，打水一样。下面是世界股票期权交易所做的一个云指数index
Rackspace Hosting, Inc.
SAP AG (ADR)
Aruba Networks, Inc.
NetSuite, Inc.
Netflix Inc.
Open Text Corporation
Akamai Technologies, Inc.
Google Inc.
Oracle Corporation
Salesforce.com, Inc.
Amazon.com, Inc.
Cisco Systems, Inc.
Equinix, Inc.
Juniper Networks, Inc.
NetApp Inc.
EMC Corporation
VMware, Inc.
TIBCO Software Inc.
F5 Networks, Inc.
Red Hat, Inc.
Acme Packet, Inc.
Teradata Corporation
Apple Inc.
International Business Machines Corporation
Microsoft Corporation
Brightcove Inc.
Informatica Corporation
Hewlett–Packard Company
OPNET Technologies Inc.
Zynga Inc.
j2 Global Inc.
Financial Engines, Inc.
NetScout Systems, Inc.
Adobe Systems Incorporated
Intuit Inc.
Activision Blizzard, Inc.
Wipro Ltd. (ADR)
BMC Software, Inc.
Polycom, Inc.
CA Inc.
Check Point Software Technologies Ltd.
