Here is a list of the tables in 1.6.3:
(asterisks mark some important related tables)
exp_actions
exp_blacklisted
exp_captcha
exp_categories
exp_category_field_data
exp_category_fields
exp_category_groups
exp_category_posts
* exp_comments
exp_cp_log
exp_email_cache
exp_email_cache_mg
exp_email_cache_ml
exp_email_console_cache
exp_email_tracker
exp_entry_groups
exp_entry_ping_status
exp_entry_versioning
exp_extensions
exp_field_formatting
exp_field_groups
exp_galleries
exp_gallery_categories
exp_gallery_comments
exp_gallery_entries
exp_global_variables
exp_html_buttons
exp_mailing_list
exp_mailing_list_queue
exp_mailing_lists
exp_member_bulletin_board
exp_member_data
exp_member_fields
exp_member_groups
exp_member_homepage
exp_member_search
exp_members
exp_message_attachments
exp_message_copies
exp_message_data
exp_message_folders
exp_message_listed
exp_metaweblog_api
exp_moblogs
exp_module_member_groups
exp_modules
exp_online_users
exp_pages_configuration
exp_password_lockout
exp_ping_servers
exp_referrers
* exp_relationships
exp_reset_password
exp_revision_tracker
exp_search
exp_search_log
exp_security_hashes
exp_sessions
exp_simple_commerce_emails
exp_simple_commerce_items
exp_simple_commerce_purchases
exp_sites
exp_specialty_templates
exp_stats
exp_status_groups
exp_status_no_access
exp_statuses
exp_temp_union
exp_template_groups
exp_template_member_groups
exp_template_no_access
exp_templates
exp_throttle
exp_trackbacks
exp_updated_site_pings
exp_updated_sites
exp_upload_no_access
* exp_upload_prefs
* exp_weblog_data
* exp_weblog_fields
* exp_weblog_member_groups
* exp_weblog_titles
* exp_weblogs
exp_wiki_categories
exp_wiki_category_articles
exp_wiki_namespaces
exp_wiki_page
exp_wiki_revisions
exp_wiki_search
exp_wiki_uploads
exp_wikis
Category:Out of Date Page
Category:Database
Category:Queries