Examples of CSS properties practical usage span, src, etc.

-secondary
-sgs-span-settings
-svg-background
SBUTTON
SECTION
SIZE
START
STemplate
Sans
Search
Section
See
SelectedTab
Serif
Shortcode
SkinObject
Slab
Source
Start
Style
Stylesheet
Sub-Object
Sub-modifier
Sub-object
Sub-objects
Support
s_txt-input
sale-label
sb-search-input
sb-toggle
sbSelector
sbToggle
sc-button
sc-lead
sc_icon
screen-reader-text
screenreaders
scroll
scroll-item
scroll-to-top
scroll-top
scroll-top-link
scroll-up
scrollToTop
scrollTop
scrolldown
scrollleft
scrollright
scrollup
sd-button
sd-title
search
search-block
search-box
search-btn
search-button
search-choice-close
search-field
search-form
search-icon
search-input
search-link
search-query
search-submit
search-toggle
search-trigger
searchForm
search_box
search_button
search_field
search_results
search_submit
searchbox
searchfield
searchform
searchsubmit
second
secondary
secondary-toggle
section
section-title
sectionType
sectiontableentry1
sectiontableentry2
see-all
segment
sel
select
select-wrapper
select2-choice
selected
selection-box
selector
selector-down
send
sep
sep-shadow
sep-text
separator
service
service-box
service-icon
service-item
services
set
sf-with-ul
shadow
shadow-decoration
shadow_lifted
share
share-buttons
share-facebook
share-more
share-twitter
shipping_calculator
shop
shopping-cart
shopping_cart
short-description
shortcode-action-bg
shortcode-pullquote
show
show-all
show-info-link
show-map
show-on-focus
showcart
shown
side-header-border
side-header-content
sidebar
sidebar-toggle
sidebar-widget
sidebar_tab
sign
signup
silver
simple
simptip-movable
single
single-profile-top
site
site-container
site-content
site-footer
site-header
site-info
site-inner
site-title
sitemap
size
skin-dark
skin-light
skip
skip-cart
skip-link
skiplink
skype
slick-arrow
slick-disabled
slick-list
slick-next
slick-prev
slick-track
slicknav_menu
slide
slider
slider-active
slider-btn-next
slider-btn-prev
slider-control
slider-next
slider-prev
slider-wrapper
slider_images
slides
slides-container
slideshow
slideshow-next
slideshow-prev
sm-form-control
small
small-centered
small-preview
small-uncentered
social
social-icon
social-icons
social-links
social-networks
social_share_holder
sorter
sorting
sorting_asc
sorting_desc
soundcloud
sp-arrow
sp-has-child
sp-next-arrow
sp-previous-arrow
spacer
span
span2
span3
span4
span6
speak
special
speed
spinner
split
spotify
spotlight
sprite-ref
sprocket-readmore
sqs-svg-icon--list
square
sr-only-focusable
src
st-menu
star
star-1
star-2
star-3
star-4
star-5
star-rating
star-rating-hover
star-rating-on
star_hover
star_on
stars
start
start-stop
static
stdParam
step
step-title
step-wrapper
stepbox3-content
sticky
sticky-header
sticky-on
sticky-wrapper
stripe
stroke
stroke-dasharray
stroke-dashoffset
stroke-opacity
stroke-width
strong
stumbleupon
style
style-1
style-2
style-3
style-dark-override
style1
style2
style3
style4
style5
style6
style_outlined
styled
styler
styles
sub
sub-downwards
sub-menu
sub-menu-link
sub-nav
sub-object
sub-objects
subCategoryImage
sub_nav_item
subbutton
subheading
sublevel
submenu
submenu-button
submenuitem
submenuitemlink
submit
submit-button
submit-button-style
submit-field
submitCommentButton
submit_comment
subnav
subscribe
success
summary
summary-collapse
support
svg
swatch-link
swiper-slide
swiper_wrapper
switch
switch-paddle