User agent detail

	General			Device					Bot
Provider	Browser	Engine	OS	Brand	Model	Type	Is mobile	Is touch	Is bot	Name	Type	Parse time	Actions
Test suite
Zsxsoft 1.3 vendor/zsxsoft/php-useragent/tests/UserAgentList.php	Ubuntu Web Browser											0	Detail Zsxsoft result detail `Array ( [0] => img/16/browser/ubuntuwebbrowser.png [1] => img/16/device/ubuntutouch.png [2] => Ubuntu Web Browser [3] => [4] => Ubuntu Web Browser [5] => [6] => [7] => [8] => Ubuntu Phone [9] => device )` close
Providers
BrowscapFull 6014	No result found
BrowscapLite 6014	No result found
BrowscapPhp 6014	No result found
DonatjUAParser v0.5.1	No result found
JenssegersAgent v2.3.3	Mozilla		Ubuntu									0.002	Detail JenssegersAgent result detail `Array ( [browserName] => Mozilla [browserVersion] => [osName] => Ubuntu [osVersion] => [deviceModel] => WebKit [isMobile] => [isRobot] => [botName] => )` close
NeutrinoApiCom			Ubuntu Touch			mobile-browser	yes					0.19801	Detail NeutrinoApiCom result detail `stdClass Object ( [mobile_screen_height] => 0 [is_mobile] => 1 [type] => mobile-browser [mobile_brand] => [mobile_model] => [version] => [is_android] => [browser_name] => unknown [operating_system_family] => Ubuntu Touch [operating_system_version] => [is_ios] => [producer] => [operating_system] => Ubuntu Touch [mobile_screen_width] => 0 [mobile_browser] => )` close
PiwikDeviceDetector 3.6.1			Ubuntu			desktop						0.006	Detail PiwikDeviceDetector result detail Array ( [client] => [operatingSystem] => Array ( [name] => Ubuntu [short_name] => UBT [version] => [platform] => ) [device] => Array ( [brand] => [brandName] => [model] => [device] => 0 [deviceName] => desktop ) [bot] => [extra] => Array ( [isBot] => [isBrowser] => [isFeedReader] => [isMobileApp] => [isPIM] => [isLibrary] => [isMediaPlayer] => [isCamera] => [isCarBrowser] => [isConsole] => [isFeaturePhone] => [isPhablet] => [isPortableMediaPlayer] => [isSmartDisplay] => [isSmartphone] => [isTablet] => [isTV] => [isDesktop] => 1 [isMobile] => [isTouchEnabled] => ) ) close
SinergiBrowserDetector 6.0.1	Mozilla 5.0											0	Detail SinergiBrowserDetector result detail Array ( [browser] => Sinergi\BrowserDetector\Browser Object ( [userAgent:Sinergi\BrowserDetector\Browser:private] => Sinergi\BrowserDetector\UserAgent Object ( [userAgentString:Sinergi\BrowserDetector\UserAgent:private] => Mozilla/5.0 (Ubuntu; Mobile) WebKit/537.21 ) [name:Sinergi\BrowserDetector\Browser:private] => Mozilla [version:Sinergi\BrowserDetector\Browser:private] => 5.0 [isRobot:Sinergi\BrowserDetector\Browser:private] => [isChromeFrame:Sinergi\BrowserDetector\Browser:private] => [isFacebookWebView:Sinergi\BrowserDetector\Browser:private] => [isCompatibilityMode:Sinergi\BrowserDetector\Browser:private] => ) [operatingSystem] => Sinergi\BrowserDetector\Os Object ( [name:Sinergi\BrowserDetector\Os:private] => unknown [version:Sinergi\BrowserDetector\Os:private] => unknown [isMobile:Sinergi\BrowserDetector\Os:private] => [userAgent:Sinergi\BrowserDetector\Os:private] => Sinergi\BrowserDetector\UserAgent Object ( [userAgentString:Sinergi\BrowserDetector\UserAgent:private] => Mozilla/5.0 (Ubuntu; Mobile) WebKit/537.21 ) ) [device] => Sinergi\BrowserDetector\Device Object ( [name:Sinergi\BrowserDetector\Device:private] => unknown [userAgent:Sinergi\BrowserDetector\Device:private] => Sinergi\BrowserDetector\UserAgent Object ( [userAgentString:Sinergi\BrowserDetector\UserAgent:private] => Mozilla/5.0 (Ubuntu; Mobile) WebKit/537.21 ) ) ) close
UAParser v3.4.5			Ubuntu									0.002	Detail UAParser result detail `UAParser\Result\Client Object ( [ua] => UAParser\Result\UserAgent Object ( [major] => [minor] => [patch] => [family] => Other ) [os] => UAParser\Result\OperatingSystem Object ( [major] => [minor] => [patch] => [patchMinor] => [family] => Ubuntu ) [device] => UAParser\Result\Device Object ( [brand] => [model] => [family] => Other ) [originalUserAgent] => Mozilla/5.0 (Ubuntu; Mobile) WebKit/537.21 )` close
UserAgentApiCom	Mozilla 5.0	WebKit 537.21				Mobile						0.15101	Detail UserAgentApiCom result detail `stdClass Object ( [platform_name] => Mobile [platform_version] => 537.21 [platform_type] => Mobile [browser_name] => Mozilla [browser_version] => 5.0 [engine_name] => WebKit [engine_version] => 537.21 )` close
UserAgentStringCom	No result found
WhatIsMyBrowserCom	5.0	WebKit 537.21	Linux									0.23501	Detail WhatIsMyBrowserCom result detail stdClass Object ( [operating_system_name] => Linux [simple_sub_description_string] => [simple_browser_string] => Unknown Mobile Browser 5 on Ubuntu Linux [browser_version] => 5 [extra_info] => Array ( ) [operating_platform] => [extra_info_table] => Array ( ) [layout_engine_name] => WebKit [detected_addons] => Array ( ) [operating_system_flavour_code] => ubuntu [hardware_architecture] => [operating_system_flavour] => Ubuntu [operating_system_frameworks] => Array ( ) [browser_name_code] => unknown-mobile-browser [operating_system_version] => [simple_operating_platform_string] => [is_abusive] => [layout_engine_version] => 537.21 [browser_capabilities] => Array ( ) [operating_platform_vendor_name] => [operating_system] => Ubuntu Linux [operating_system_version_full] => [operating_platform_code] => [browser_name] => Unknown Mobile Browser [operating_system_name_code] => linux [user_agent] => Mozilla/5.0 (Ubuntu; Mobile) WebKit/537.21 [browser_version_full] => 5.0 [browser] => Unknown Mobile Browser 5 ) close
WhichBrowser v2.0.18		Webkit 537.21	Ubuntu Touch			mobile:smart	yes					0	Detail WhichBrowser result detail `Array ( [engine] => Array ( [name] => Webkit [version] => 537.21 ) [os] => Array ( [name] => Ubuntu Touch ) [device] => Array ( [type] => mobile [subtype] => smart ) )` close
Woothee v1.2.0	No result found
Wurfl 1.7.1.0				Ubuntu	Touch OS	Feature Phone	yes	yes				0.016	Detail Wurfl result detail Array ( [virtual] => Array ( [is_android] => false [is_ios] => false [is_windows_phone] => false [is_app] => false [is_full_desktop] => false [is_largescreen] => false [is_mobile] => true [is_robot] => false [is_smartphone] => false [is_touchscreen] => true [is_wml_preferred] => false [is_xhtmlmp_preferred] => true [is_html_preferred] => false [advertised_device_os] => [advertised_device_os_version] => [advertised_browser] => [advertised_browser_version] => [complete_device_name] => Ubuntu Touch OS [device_name] => Ubuntu Touch OS [form_factor] => Feature Phone [is_phone] => true [is_app_webview] => false ) [all] => Array ( [brand_name] => Ubuntu [model_name] => Touch OS [unique] => true [ununiqueness_handler] => [is_wireless_device] => true [device_claims_web_support] => false [has_qwerty_keyboard] => false [can_skip_aligned_link_row] => true [uaprof] => [uaprof2] => [uaprof3] => [nokia_series] => 0 [nokia_edition] => 0 [device_os] => Ubuntu Touch [mobile_browser] => Ubuntu Touch Browser [mobile_browser_version] => [device_os_version] => [pointing_method] => touchscreen [release_date] => 2014_march [marketing_name] => [model_extra_info] => [nokia_feature_pack] => 0 [can_assign_phone_number] => true [is_tablet] => false [manufacturer_name] => [is_bot] => false [is_google_glass] => false [proportional_font] => false [built_in_back_button_support] => false [card_title_support] => true [softkey_support] => false [table_support] => true [numbered_menus] => false [menu_with_select_element_recommended] => false [menu_with_list_of_links_recommended] => true [icons_on_menu_items_support] => false [break_list_of_links_with_br_element_recommended] => true [access_key_support] => false [wrap_mode_support] => false [times_square_mode_support] => false [deck_prefetch_support] => false [elective_forms_recommended] => true [wizards_recommended] => false [image_as_link_support] => false [insert_br_element_after_widget_recommended] => false [wml_can_display_images_and_text_on_same_line] => false [wml_displays_image_in_center] => false [opwv_wml_extensions_support] => false [wml_make_phone_call_string] => wtai://wp/mc; [chtml_display_accesskey] => false [emoji] => false [chtml_can_display_images_and_text_on_same_line] => false [chtml_displays_image_in_center] => false [imode_region] => none [chtml_make_phone_call_string] => tel: [chtml_table_support] => false [xhtml_honors_bgcolor] => false [xhtml_supports_forms_in_table] => false [xhtml_support_wml2_namespace] => false [xhtml_autoexpand_select] => false [xhtml_select_as_dropdown] => false [xhtml_select_as_radiobutton] => false [xhtml_select_as_popup] => false [xhtml_display_accesskey] => false [xhtml_supports_invisible_text] => false [xhtml_supports_inline_input] => false [xhtml_supports_monospace_font] => false [xhtml_supports_table_for_layout] => false [xhtml_supports_css_cell_table_coloring] => false [xhtml_format_as_css_property] => false [xhtml_format_as_attribute] => false [xhtml_nowrap_mode] => false [xhtml_marquee_as_css_property] => false [xhtml_readable_background_color1] => #FFFFFF [xhtml_readable_background_color2] => #FFFFFF [xhtml_allows_disabled_form_elements] => false [xhtml_document_title_support] => true [xhtml_preferred_charset] => utf8 [opwv_xhtml_extensions_support] => false [xhtml_make_phone_call_string] => tel: [xhtmlmp_preferred_mime_type] => application/vnd.wap.xhtml+xml [xhtml_table_support] => true [xhtml_send_sms_string] => none [xhtml_send_mms_string] => none [xhtml_file_upload] => not_supported [cookie_support] => true [accept_third_party_cookie] => true [xhtml_supports_iframe] => none [xhtml_avoid_accesskeys] => false [xhtml_can_embed_video] => none [ajax_support_javascript] => false [ajax_manipulate_css] => false [ajax_support_getelementbyid] => false [ajax_support_inner_html] => false [ajax_xhr_type] => none [ajax_manipulate_dom] => false [ajax_support_events] => false [ajax_support_event_listener] => false [ajax_preferred_geoloc_api] => none [xhtml_support_level] => 1 [preferred_markup] => html_wi_oma_xhtmlmp_1_0 [wml_1_1] => true [wml_1_2] => false [wml_1_3] => false [html_wi_w3_xhtmlbasic] => true [html_wi_oma_xhtmlmp_1_0] => true [html_wi_imode_html_1] => false [html_wi_imode_html_2] => false [html_wi_imode_html_3] => false [html_wi_imode_html_4] => false [html_wi_imode_html_5] => false [html_wi_imode_htmlx_1] => false [html_wi_imode_htmlx_1_1] => false [html_wi_imode_compact_generic] => false [html_web_3_2] => false [html_web_4_0] => false [voicexml] => false [multipart_support] => false [total_cache_disable_support] => false [time_to_live_support] => false [resolution_width] => 128 [resolution_height] => 92 [columns] => 11 [max_image_width] => 120 [max_image_height] => 92 [rows] => 6 [physical_screen_width] => 27 [physical_screen_height] => 27 [dual_orientation] => false [density_class] => 1.0 [wbmp] => true [bmp] => false [epoc_bmp] => false [gif_animated] => true [jpg] => true [png] => true [tiff] => false [transparent_png_alpha] => false [transparent_png_index] => false [svgt_1_1] => false [svgt_1_1_plus] => false [greyscale] => false [gif] => true [colors] => 256 [webp_lossy_support] => false [webp_lossless_support] => false [post_method_support] => true [basic_authentication_support] => true [empty_option_value_support] => true [emptyok] => false [nokia_voice_call] => false [wta_voice_call] => false [wta_phonebook] => false [wta_misc] => false [wta_pdc] => false [https_support] => true [phone_id_provided] => false [max_data_rate] => 9 [wifi] => false [sdio] => false [vpn] => false [has_cellular_radio] => true [max_deck_size] => 10000 [max_url_length_in_requests] => 256 [max_url_length_homepage] => 0 [max_url_length_bookmark] => 0 [max_url_length_cached_page] => 0 [max_no_of_connection_settings] => 0 [max_no_of_bookmarks] => 0 [max_length_of_username] => 0 [max_length_of_password] => 0 [max_object_size] => 0 [downloadfun_support] => false [directdownload_support] => false [inline_support] => false [oma_support] => false [ringtone] => false [ringtone_3gpp] => false [ringtone_midi_monophonic] => false [ringtone_midi_polyphonic] => false [ringtone_imelody] => false [ringtone_digiplug] => false [ringtone_compactmidi] => false [ringtone_mmf] => false [ringtone_rmf] => false [ringtone_xmf] => false [ringtone_amr] => false [ringtone_awb] => false [ringtone_aac] => false [ringtone_wav] => false [ringtone_mp3] => false [ringtone_spmidi] => false [ringtone_qcelp] => false [ringtone_voices] => 1 [ringtone_df_size_limit] => 0 [ringtone_directdownload_size_limit] => 0 [ringtone_inline_size_limit] => 0 [ringtone_oma_size_limit] => 0 [wallpaper] => false [wallpaper_max_width] => 0 [wallpaper_max_height] => 0 [wallpaper_preferred_width] => 0 [wallpaper_preferred_height] => 0 [wallpaper_resize] => none [wallpaper_wbmp] => false [wallpaper_bmp] => false [wallpaper_gif] => false [wallpaper_jpg] => false [wallpaper_png] => false [wallpaper_tiff] => false [wallpaper_greyscale] => false [wallpaper_colors] => 2 [wallpaper_df_size_limit] => 0 [wallpaper_directdownload_size_limit] => 0 [wallpaper_inline_size_limit] => 0 [wallpaper_oma_size_limit] => 0 [screensaver] => false [screensaver_max_width] => 0 [screensaver_max_height] => 0 [screensaver_preferred_width] => 0 [screensaver_preferred_height] => 0 [screensaver_resize] => none [screensaver_wbmp] => false [screensaver_bmp] => false [screensaver_gif] => false [screensaver_jpg] => false [screensaver_png] => false [screensaver_greyscale] => false [screensaver_colors] => 2 [screensaver_df_size_limit] => 0 [screensaver_directdownload_size_limit] => 0 [screensaver_inline_size_limit] => 0 [screensaver_oma_size_limit] => 0 [picture] => false [picture_max_width] => 0 [picture_max_height] => 0 [picture_preferred_width] => 0 [picture_preferred_height] => 0 [picture_resize] => none [picture_wbmp] => false [picture_bmp] => false [picture_gif] => false [picture_jpg] => false [picture_png] => false [picture_greyscale] => false [picture_colors] => 2 [picture_df_size_limit] => 0 [picture_directdownload_size_limit] => 0 [picture_inline_size_limit] => 0 [picture_oma_size_limit] => 0 [video] => false [oma_v_1_0_forwardlock] => false [oma_v_1_0_combined_delivery] => false [oma_v_1_0_separate_delivery] => false [streaming_video] => false [streaming_3gpp] => false [streaming_mp4] => false [streaming_mov] => false [streaming_video_size_limit] => 0 [streaming_real_media] => none [streaming_flv] => false [streaming_3g2] => false [streaming_vcodec_h263_0] => -1 [streaming_vcodec_h263_3] => -1 [streaming_vcodec_mpeg4_sp] => -1 [streaming_vcodec_mpeg4_asp] => -1 [streaming_vcodec_h264_bp] => -1 [streaming_acodec_amr] => none [streaming_acodec_aac] => none [streaming_wmv] => none [streaming_preferred_protocol] => rtsp [streaming_preferred_http_protocol] => none [wap_push_support] => false [connectionless_service_indication] => false [connectionless_service_load] => false [connectionless_cache_operation] => false [connectionoriented_unconfirmed_service_indication] => false [connectionoriented_unconfirmed_service_load] => false [connectionoriented_unconfirmed_cache_operation] => false [connectionoriented_confirmed_service_indication] => false [connectionoriented_confirmed_service_load] => false [connectionoriented_confirmed_cache_operation] => false [utf8_support] => true [ascii_support] => false [iso8859_support] => false [expiration_date] => false [j2me_cldc_1_0] => false [j2me_cldc_1_1] => false [j2me_midp_1_0] => false [j2me_midp_2_0] => false [doja_1_0] => false [doja_1_5] => false [doja_2_0] => false [doja_2_1] => false [doja_2_2] => false [doja_3_0] => false [doja_3_5] => false [doja_4_0] => false [j2me_jtwi] => false [j2me_mmapi_1_0] => false [j2me_mmapi_1_1] => false [j2me_wmapi_1_0] => false [j2me_wmapi_1_1] => false [j2me_wmapi_2_0] => false [j2me_btapi] => false [j2me_3dapi] => false [j2me_locapi] => false [j2me_nokia_ui] => false [j2me_motorola_lwt] => false [j2me_siemens_color_game] => false [j2me_siemens_extension] => false [j2me_heap_size] => 0 [j2me_max_jar_size] => 0 [j2me_storage_size] => 0 [j2me_max_record_store_size] => 0 [j2me_screen_width] => 0 [j2me_screen_height] => 0 [j2me_canvas_width] => 0 [j2me_canvas_height] => 0 [j2me_bits_per_pixel] => 0 [j2me_audio_capture_enabled] => false [j2me_video_capture_enabled] => false [j2me_photo_capture_enabled] => false [j2me_capture_image_formats] => none [j2me_http] => false [j2me_https] => false [j2me_socket] => false [j2me_udp] => false [j2me_serial] => false [j2me_gif] => false [j2me_gif89a] => false [j2me_jpg] => false [j2me_png] => false [j2me_bmp] => false [j2me_bmp3] => false [j2me_wbmp] => false [j2me_midi] => false [j2me_wav] => false [j2me_amr] => false [j2me_mp3] => false [j2me_mp4] => false [j2me_imelody] => false [j2me_rmf] => false [j2me_au] => false [j2me_aac] => false [j2me_realaudio] => false [j2me_xmf] => false [j2me_wma] => false [j2me_3gpp] => false [j2me_h263] => false [j2me_svgt] => false [j2me_mpeg4] => false [j2me_realvideo] => false [j2me_real8] => false [j2me_realmedia] => false [j2me_left_softkey_code] => 0 [j2me_right_softkey_code] => 0 [j2me_middle_softkey_code] => 0 [j2me_select_key_code] => 0 [j2me_return_key_code] => 0 [j2me_clear_key_code] => 0 [j2me_datefield_no_accepts_null_date] => false [j2me_datefield_broken] => false [receiver] => false [sender] => false [mms_max_size] => 0 [mms_max_height] => 0 [mms_max_width] => 0 [built_in_recorder] => false [built_in_camera] => false [mms_jpeg_baseline] => false [mms_jpeg_progressive] => false [mms_gif_static] => false [mms_gif_animated] => false [mms_png] => false [mms_bmp] => false [mms_wbmp] => false [mms_amr] => false [mms_wav] => false [mms_midi_monophonic] => false [mms_midi_polyphonic] => false [mms_midi_polyphonic_voices] => 0 [mms_spmidi] => false [mms_mmf] => false [mms_mp3] => false [mms_evrc] => false [mms_qcelp] => false [mms_ota_bitmap] => false [mms_nokia_wallpaper] => false [mms_nokia_operatorlogo] => false [mms_nokia_3dscreensaver] => false [mms_nokia_ringingtone] => false [mms_rmf] => false [mms_xmf] => false [mms_symbian_install] => false [mms_jar] => false [mms_jad] => false [mms_vcard] => false [mms_vcalendar] => false [mms_wml] => false [mms_wbxml] => false [mms_wmlc] => false [mms_video] => false [mms_mp4] => false [mms_3gpp] => false [mms_3gpp2] => false [mms_max_frame_rate] => 0 [nokiaring] => false [picturemessage] => false [operatorlogo] => false [largeoperatorlogo] => false [callericon] => false [nokiavcard] => false [nokiavcal] => false [sckl_ringtone] => false [sckl_operatorlogo] => false [sckl_groupgraphic] => false [sckl_vcard] => false [sckl_vcalendar] => false [text_imelody] => false [ems] => false [ems_variablesizedpictures] => false [ems_imelody] => false [ems_odi] => false [ems_upi] => false [ems_version] => 0 [siemens_ota] => false [siemens_logo_width] => 101 [siemens_logo_height] => 29 [siemens_screensaver_width] => 101 [siemens_screensaver_height] => 50 [gprtf] => false [sagem_v1] => false [sagem_v2] => false [panasonic] => false [sms_enabled] => true [wav] => false [mmf] => false [smf] => false [mld] => false [midi_monophonic] => false [midi_polyphonic] => false [sp_midi] => false [rmf] => false [xmf] => false [compactmidi] => false [digiplug] => false [nokia_ringtone] => false [imelody] => false [au] => false [amr] => false [awb] => false [aac] => false [mp3] => false [voices] => 1 [qcelp] => false [evrc] => false [flash_lite_version] => [fl_wallpaper] => false [fl_screensaver] => false [fl_standalone] => false [fl_browser] => false [fl_sub_lcd] => false [full_flash_support] => false [css_supports_width_as_percentage] => true [css_border_image] => none [css_rounded_corners] => none [css_gradient] => none [css_spriting] => false [css_gradient_linear] => none [is_transcoder] => false [transcoder_ua_header] => user-agent [rss_support] => false [pdf_support] => false [progressive_download] => false [playback_vcodec_h263_0] => -1 [playback_vcodec_h263_3] => -1 [playback_vcodec_mpeg4_sp] => -1 [playback_vcodec_mpeg4_asp] => -1 [playback_vcodec_h264_bp] => -1 [playback_real_media] => none [playback_3gpp] => false [playback_3g2] => false [playback_mp4] => false [playback_mov] => false [playback_acodec_amr] => none [playback_acodec_aac] => none [playback_df_size_limit] => 0 [playback_directdownload_size_limit] => 0 [playback_inline_size_limit] => 0 [playback_oma_size_limit] => 0 [playback_acodec_qcelp] => false [playback_wmv] => none [hinted_progressive_download] => false [html_preferred_dtd] => xhtml_mp1 [viewport_supported] => false [viewport_width] => [viewport_userscalable] => [viewport_initial_scale] => [viewport_maximum_scale] => [viewport_minimum_scale] => [mobileoptimized] => false [handheldfriendly] => false [canvas_support] => none [image_inlining] => false [is_smarttv] => false [is_console] => false [nfc_support] => false [ux_full_desktop] => false [jqm_grade] => none [is_sencha_touch_ok] => false ) ) close
Zsxsoft 1.3	Ubuntu Web Browser			Ubuntu Phone								0	Detail Zsxsoft result detail Array ( [browser] => Array ( [link] => https://launchpad.net/webbrowser-app [title] => Ubuntu Web Browser [name] => Ubuntu Web Browser [version] => [code] => ubuntuwebbrowser [image] => img/16/browser/ubuntuwebbrowser.png ) [os] => Array ( [link] => [name] => [version] => [code] => null [x64] => [title] => [type] => os [dir] => os [image] => img/16/os/null.png ) [device] => Array ( [link] => http://www.ubuntu.com/phone [title] => Ubuntu Phone [model] => [brand] => Ubuntu Phone [code] => ubuntutouch [dir] => device [type] => device [image] => img/16/device/ubuntutouch.png ) [platform] => Array ( [link] => http://www.ubuntu.com/phone [title] => Ubuntu Phone [model] => [brand] => Ubuntu Phone [code] => ubuntutouch [dir] => device [type] => device [image] => img/16/device/ubuntutouch.png ) ) close

Mozilla/5.0 (Ubuntu; Mobile) WebKit/537.21

Zsxsoft result detail

JenssegersAgent result detail

NeutrinoApiCom result detail

PiwikDeviceDetector result detail

SinergiBrowserDetector result detail

UAParser result detail

UserAgentApiCom result detail

WhatIsMyBrowserCom result detail

WhichBrowser result detail

Wurfl result detail

Zsxsoft result detail

About this comparison